Mercedes hose friction loss FDNY Spec hose also carries a 1-year all hazards warranty. Check out this informative Mercedes fire hose friction loss chart. 75" ARMTEX HP 2. 5" flows with a 2" hose - Lower weight, increased flexibility, high kink resistance, and low friction loss, all combined with proven strength & durability. SPECS: This fire hose is made out of the toughest spun polyester jacket to ensure strength and durability. This advancement in fire hose technology was important for many fire departments that were facing Mar 29, 2022 · Company's most advanced 2-inch attack hose delivers 2. We extrude a molten lining material directly onto the fabric jacket at the loom, creating a superior waterway — free from adhesives, glues or other bonding agents. Mertex® lining is also smoother than other polyurethane lined hoses, resulting in one of the lowest friction loss products on the market. friction loss = friction loss coefficient * ( flow rate / 100) 2 * hose The Mercedes FireBoss Forestry Hose is engineered to provide superior durability, flexibility, and performance in the most demanding wildland firefighting environments. Q = flow rate. Rapid Intervention Team (RIT) & High-Rise Hose Kits, Attack Hose; De-Contamination & Wash Down Hose; Potable Water Transfer Hose (Stenciled) MTSS-800TM FOR THE COST CONSCIOUS FIRE SERVICE. Rugged and Lightweight Construction The hose must remain fl exible to -65°F (-55°C) FLOW AND FRICTION LOSS 1 ¾ inch (44mm) diameter @ 100 US GPM (379 LPM), shall not exceed 6. Mar 2, 2002 · The Friction Loss sheet allows you to input GPM, pump discharge pressure, desired nozzle pressure, and elevation change and it will calculate the length of hose using both standard "C" values from the charts, and the far superior "C" values from several makes/models of modern fire hose (willing to add any others in I can get manufacturer's numbers for! SAMPLE SUPPLY HOSE BED CONFIGURATIONS. #Mercedes #Firefighter #Fire Shows nozzle pressure calculations on one side and friction loss on the other side. 5” hose. The Firebreak II is an innovative and reliable weeping hose used by wildland firefighters. It SKU: 626210-25, 626210-50, 626210-100 Categories: Home Fire Protection, Hoses & Hose Packs, Hoses, 1" Hose, Nozzles & Accessories Brand:Mercedes Textiles Perfect for attack lines and hose lays! Additional Shipping & Handling Charges May Apply That's our goal! We want to be fully transparent with our product performance and specifications. and low friction loss – all combined with Mercedes Textiles’ proven strength and Apr 30, 2024 · Thus, the friction loss per 100 feet of 1¾-inch hose when flowing 95 gpm is 14 psi; for a 200-foot line, your friction loss is 28. Length: 100’ FL is Friction Loss C is the loss coefficient which is a set number based on the diameter of your hose Q is the volume of water at the tip divided by 100 and L is the length of hose divided by 100 so in your case FL would be 15. Get all the specs at www. FRICTION LOSS (FL): PDP = NP +/-H + FL The next element in the PDP formula is friction loss (FL). 5" lines. If we use a K value of 243 and do the calculations for 100 ft. It's a great resource for firefighter training and understanding the capabilities of fire trucks. Mercedes Textiles publishes all hose measurements to our KnowYourHose. With its advanced design, low friction loss, and rugged construction, the FireBoss stands ready for action. What is friction loss formula? In fluids, friction loss is the loss of pressure or height that occurs in the flow of the pipe or conduit due to the effect of the viscosity of the fluid near the pipe surface. @mercedestextiles Super II is ideal for advanced interior tactics, high-rise applications, and limited manpower situations. Access the fire calculator app too. 3 Friction loss varies with » Features our Mercedes Textiles Limited “Two Year All Hazards Warranty Hose Spec. 5" hose. It’s caused by the friction between the water and the This friction loss calculator uses the Hazen-Williams equation to estimate the pressure or friction loss in pipes. The Mertex® lining yields an extremely low May 17, 2023 · Mercedes Textiles’ patented Breather Technology adds flexibility, strength, and releases trapped air and water for improved packability. I’m looking for help on researching friction loss for hand lines. Since Mercedes’ hose with Mertex® are not laminated like other hose, it is virtually impossible for them to delaminate. This exceptionally smooth lining minimizes friction loss and yields greater water flow at the discharge end. 87 power of the diameter. The chart, technically called a nomograph, acts as a vernier scale to quickly connect known information to find friction loss, nozzle reaction forces, and nozzle flow on the fire ground. Calculating the friction loss in a given pipe system includes two things. This energy loss is expressed in pounds per square inch loss. We use Mercedes Kraken EXO hose Pump operators should commit these five friction loss principles to memory: All fire hose has friction loss. KrakenEXO SUPER II™ (2. Jun 1, 2019 · Lighthill points out the through-the-weave design “reduces friction loss and gives unmatched kink resistance. Draftlite High Pressure Suction Hose A crush resistant draft hose where light weight and high pressure resistance are critical. and equipment. com, offering their library of detailed hose specs following new NFPA 1961 standards, friction loss calculator and articles Lower weight, increased flexibility, high kink resistance, and low friction loss, all combined with our proven strength and durability. 75” hose and 1. thus for 5" hose at 1200 gpm we have the middle finger (3) squared or about 9 psi per hundred. May 15, 2024 · Mercedes Textiles launches online resource hub KnowYourHose. Note: Actual hose colors may vary from the colors shown in this catalogue Our Mertex® Process Synthetic Hose Lining (smooth surface = less friction/greater fl ow) Example: Competitor’s Synthetic hose lining (rough surface = less fl ow) Hose Loom with “Extruder” Experience up to 66% greater fl ow Feb 6, 2023 · The KrakenEXO SUPER II™ from Mercedes Textiles is the most advanced double-jacketed attack 2-inch hose capable of delivering targeted flows of 210-300 gpm with up to 30 percent Despite being lighter, we actually put more raw material and use higher quality materials to make a premium attack hose with exceptional durability, kink resistance, and friction loss—which is especially important in long-distance wildland applications. It uses the Mertex lining for low friction loss and the patented Breather™ technology that releases trapped air and water from the hose. mercedestextiles. What Causes Friction Loss In Pipe? Friction loss in fluids refers to the reduction in pressure or energy of flowing fluid Jan 18, 2000 · Generally 3" hose with 2 1/2" couplings has a friction loss equal to the flow in 100's squared, or a loss of 25 psi / 100 ft. His crews had experimented with over-pumping a standard 2" hose to get higher flows, but found the hose to be unmanageable and the friction loss too high. 50in/64mm » The most advanced attack hose » Weighs less, Kinks Less, and Flows more Water » Unique Mertex® lining yields an extremely low friction loss, for maximum flow and superior SAMPLE SUPPLY HOSE BED CONFIGURATIONS. Feb 7, 2022 · With excellent low-pressure kink resistance, KrakenEXO®’s unique double-jacket construction offers industry-best durability without the added weight. 5" ATTACK LITE 1. 5" ARMTEX ATTACK 1. Warranty: Hose shall carry a 10-year written warranty, which includes a 1-year all hazards warranty. Published friction loss characteristics may be overly conservative. Listed are combined flows at 20 PSI per 100’ friction loss, based on common factors, as well as 30 PSI per 100’ friction loss, for departments that elect to take advantage of higher operating pressures and/or shorter lays. com, offering their library of detailed hose specs following new NFPA 1961 standards, friction loss calculator and articles on hose-related topics. When moving water comes in contact with the inner lining a hose, a loss of energy will occur due to friction. Manufacturers embraced this because they could sell "low friction loss" hose that LOOKED like every other 1. This heat, abrasion and kink resistant hose shall have superior friction loss characteristics. Currently the department im researching for uses Mercedes MTFS-800dp hose. 5 2 x 0. #Mercedes #Firefighter #Fire So use your friction loss calculation FL=Coefficient of Friction x Quantity of Water 2 (in hundreds of gallons) x Length of the Line (in hundreds of feet) Our example would be FL = 15. This hose is lightweight and portable. Lengths available up to 75'. Select a Hose: 1½" Key Big-10 1½" Key Eco-10 1½" Key Dura-Flow 1¾" Key Combat Ready 1¾" Key Combat Sniper 1¾" Key TRU-ID 1¾" Key Big-10 1¾" Key FDNY Spec 1¾" Key Eco-10 1¾" Key Key-Lite 1¾" Key Magnum 1¾" Key Dura-Flow 2" Key Combat Ready 2" Key Combat Ready with 2½" Coupling 2 Nov 16, 2019 · C = friction loss coefficient. Heavy-duty spun yarn construction with yellow Permatek treatment for higher abrasion resistance. 75in/44mm 2. Get 2. 5" JAFRIB 1. NPE assumes no responsibility or liability for any errors, omissions or misuse of the contents of this site. As a result, the PSI at the other end by fire fighting professionals as having less friction loss and different performance characteristics than the hose on which these coefficients were originally based. Fire Boss Supply Hose PDF available Here. Using Mercedes Hose to Right-Size Your Supply. It Dec 18, 2017 · In the end we went with Mercedes due mainly to cost and quality. S. 75" hose lines. Aug 4, 2016 · Friction loss characteristics of fire hose have changed as a result of evolving hose manufacturing technology. Nov 16, 2014 · Determining Friction Loss Using the Condensed “Q” Formula • 3-inch hose (with 2½- or 3-inch couplings) FL per 100 feet = Q2 FL = Friction loss in 100 feet of 3-inch hose Q = Number of hundreds of gpm Note: The amount of friction loss calculated using this formula will be 20% greater than if the same situation is calculated using FL Home » Calculators » Friction Loss Calculator Pipe Friction Loss Calculator NPE provides these calculators and guides to assist with general queries and recommends working with experts to ensure suitability. Through it’s Hydro-Wick process and Mertex lining, this weeping hose provides a combination of performance, self-wetting, low water loss and low friction loss for the wildland firefighters using it. 75 The hose must remain fl exible to -65°F (-55°C) FLOW AND FRICTION LOSS 1 ¾ inch (44mm) diameter @ 100 US GPM (379 LPM), shall not exceed 6. It marks a new milestone as we celebrate our 30th anniversary as America’s leader in the design and manufacture of woven jacketed and rubber covered fire hose products. Myti-Flo Mop Up Hose PDF available Here. Length: 50’ May 24, 2022 · This is a short video from a drill we did to test our flows, friction loss and length we could stretch our 1. The article will describe how to calculate friction loss in straight pipes and fittings Aggressive interior attack hose; Rapid intervention team (RIT) hose; For stand pipe and high rise operations; Pre-connected cross-lay attack hose; Pre-connected front bumper attack hose; Potable water transfer hose (stenciled) Features and Benefits: Extremely kink resistant, even at low pressure The friction loss calculator calculates the pressure drop or head loss through a conduit like pipe, hose, or channel. “We’ve targeted flow ranges of 145 to 175 gallons per minute (gpm),” he says, “and deliver premium kink resistance through a hose treated with Key-Lok polyurethane-based Mercedes Textiles specializes in manufacturing premium double-jacket polyurethane fire hose. 75" ARMTEX ATTACK 2" ARMTEX ATTACK 2. Regardless of the size of hose, the more you try to pump through it, the more friction loss you will have regardless of length. This meant that the ID grew, instead. 2M length of fi re hose shall not weigh more than 20 lbs / 9. ” Unique Mertex® lining yields extremely low friction loss, achieving maximum flow and superior adhesion for long life and flexibility to -65º F (-55º C) Features Mercedes Textiles Limited 2-10-L warranty (“2 year All Hazards”, “10 year against manufacturing defects” and “Lifetime against delamination”) that sacrifice durability of the hose life for the sake of weight are not acceptable. g. Friction loss is nearly independent of pressure. We compared these numbers with the previous pump chart data and confirmed that high/low friction loss numbers in Friction loss occurs when water passes through a fire hose. A single jacket hose with a service pressure of 400 psi / 2755 kpa. Jul 1, 2008 · That is the only way to figure it correctly as friction loss is on a HUGE sliding scale. What is Mertex® lining and how does it affect friction loss in fire hose? Mercedes Textiles developed a patented weave process for our Mertex® inner hose linings. This turbulence reduces the energy produced by the pump (PSI). Calculation of friction loss in straight pipes and calculating the friction loss in pipe fittings e. FLOW & FRICTION LOSS The hose must be capable of delivering targeted fl ows between 210 – 300 GPM/ 795 – 1136 LPM. 00in/51mm 2. WOVEN POLYESTER DOUBLE JACKET. Lower weight, increased flexibility, high kink resistance, and low friction loss — all combined with our proven strength and durability. HOSE PRODUCT COMPARISON. To start, download and print the PDF Document. Number the coupling of each section of hose as it is placed in the bed (chalk or soapstone) and all you need to do is check the coupling when you attach Jun 19, 2022 · 1. SELECT HOSE 1. There is no set friction loss for any one size of hose. Friction Loss (FL) = C(Q2)L PDP = NP + [FL + AL ± EP] NP = Nozzle Pressure 100 psi - Combination 80 psi - Smooth Bore (master) 50 psi - (Do not aSmooth Bore (handheld) AL = Appliance Loss 10 psi - Wye/Siamese 15 psi - Deck Gun 25 psi - Portable Monitor 25 psi - Stand Pipe 75 psi - Aerial Ladder dd elevation) EP = Elevation Pressure Each 50’ / 15. As water passes through a fire hose, friction between the water and the inside surface of the hose cause turbulence. Applications: “LDH”supply hose; Supplying stand pipe systems; Supply stand alone portable hydrants; Pumper to pumper relay; Features and Benefits: Large diameter rubber lay flat supply hose Pipe Friction Loss Calculation. The inner jacket features our unique Mertex® lining — not EDM/rubber or nitrile — for unrivaled performance and superior quality. "In order to achieve the GPM we wanted – a lot of water – with a manageable line for a single firefighter," they needed an alternative to both the 2" and the 2. These online tools do not constitute professional advice. The 1 ¾-inch fire hose provided firefighters with the capability to deliver a 200-gpm fire stream using a handline that could easily be managed by two firefighters. 5" flows with a 2" hose — for superior maneuverability & unrivaled performance. The losses are calculated based on flow rates in circular pipes, the internal diameter of the pipe, the pipe length, and the type of pipe. Most of the fog nozzles have flow rates ranging from 95 to 200 gpm. The Mertex® lining provides low friction loss. In firefighting, friction between the water and the inside surface of the pump, connected appliances and fire hose all cause turbulence. Calculating Friction Loss To calculate hose friction loss per 100 ft of hose: Oct 16, 2023 · “The hose has increased flexibility, high kink resistance, and low friction loss, along with proven strength and durability. From the hydrant to the nozzle, Mercedes manufactures both supply and attack fire hose in all standard sizes. Mercedes Textiles specializes in manufacturing premium double-jacket polyurethane fire hose. Applications Suction / Supply Line Features and Benefits. Friction losses on reeled hose average about 21 percent more than for straight hose lays. Mercedes - Aquaflow Plus & Kraken EXO. Mar 25, 2024 · Once upon a time, the 1 ¾-inch fire hose was THE technological advancement for fire hose used as a fire suppression handline. FDNY Lining is constructed with an ultra smooth oversized rubber liner to reduce friction loss. You can calculate friction loss in five easy steps: Union City: 217 Titusville Rd, Union City, PA 16438 (814) 438-7616 This is due to stronger materials allowing for thinner jackets on the hose. 75” flowing 50 psi at the tip of a 15/16” smooth bore nozzle. This friction results in an eddying of the water or turbulence within the hose. Friction loss is the pressure loss due to the friction. Features and Benefits. For example, there is more FL is 100' of 1 3/4" hose flowing 200 gpm than the same line flowing 80 gpm. 25") The most advanced double-jacketed 2” (51mm) attack hose capable of delivering targeted flows of 210-300 GPM with up to 30% less weight compared to standard 2. of 3" hose - we get 243 * 5 * 5 * 1 / 3 * 3 * 3 * 3 * 3 or 243 * 25 / 243 = 25 psi per 100 ft. Nov 13, 2020 · "The greatest reduction in friction loss in modern fire hose has been created both accidentally and later intentionally by increasing the internal diameter of charged fire hose. 5 (because our hose is 50 ft sections) = 17. #Mercedes #Firefighter #Fire. at a flow of 500 gpm. For… Oct 1, 2015 · The friction loss characteristics of fire hose are primarily determined by two factors: the smoothness of the interior surface of the hose and the hose’s interior diameter (the C coefficient in #KnowYourHose WHAT IS FRICTION LOSS? Simply put, friction loss is the reduction in water pressure that occurs as water moves through a hose. 5 x 1 2 x 3 For the employees, dealers and firefighters throughout the U. Distance, diameter, and the GPM / volume, all affect friction loss. 9 kg coupled and charged to 100PSI. 50in/38mm 1. Diameter of Hose (D) The diameter of the hose (D) refers to the internal diameter of the hose and is measured in Choose your hose and size below, enter the flow rate, as well as the hose length to display friction loss data. We've got the hose you need, guaranteed. The hose uses Key-Lok polyurethane polymer impregnation for maximum abrasion and moisture resistance. Extremely kink resistant; Heavy duty spun yarn construction; Ideal for helicopter applications Fire Boss Supply Hose PDF available Here. 5 (coefficient of the hose we run) x 1. We're known for our legendary KrakenEXO line, but we offer other quality lines for a variety of applications and priorities. 5 M) SERVICE, TEST, BURST PRESSURES Minimum service, test and burst pressures shall be as detailed in the specifi cation table on the previous page. 75" on the A proprietary reverse twill weave construction reduces friction loss, while engineered yarn selections lighten the hose up to 25% compared to competitive offerings. They kept the outer diameter the same as older hose to prevent screwing up pre-existing hosebed configurations. Dec 23, 2023 · Mercedes Textiles launches online resource hub KnowYourHose. bends, fittings, valves etc. Mar 31, 2025 · Points to remember about friction loss: Friction loss increases as flow (gpm) increases. They had the best warranty and were eager to get hose in our area. L D H S U P P L Y L IN ES. We also offer a friction loss calculator. LOW FRICTION LOSS - HIGH FLOW. KINK TEST Oct 1, 2012 · For example, if the friction loss in one length of 1¾-inch hose is 15 psi, then if four 100-foot lengths are added together, the total friction loss would be 60 psi. Assign numbers in order to your finger tips, with the thumb tip being number 1 and the pinky tip Mercedes Textiles specializes in manufacturing premium double-jacket polyurethane fire hose. the hose. Features. Features & Benefits. The frictional loss in pipes is due to the frictional resistance of the fluid flowing through the system. Friction loss is determined by the gpm flowing, the size of the hose and the length of the hose. The Key hose was also right there. 5-inch flows with up to 30 percent less weight. As the length of the hose increases, so does the friction loss, emphasizing the importance of efficient hose deployment and minimizing unnecessary lengths. Below is a sample of supply bed configurations that can help achieve these goals. Understanding the implications of this, particularly if your department runs a mixed hose fleet, is critical to achieving your target flow. 9 PSI (48 kPa) loss per 100 feet (30. 5" ATTACK LITE 3" ATTACK LITE 1. It started when the thicker double jackets of cotton were replaced by mold resistant thinner double jackets made of nylon and polyester. Manufactured using the patented Mertexfi method giving superior lining adhesion and lower friction loss due to a smoother waterway. Patented Mertex® lining process produces an amazingly smooth inner waterway, yielding an extremely low friction loss for maximum flow Oct 1, 1990 · Turn the palm of your left hand up as you would for calculating friction loss in 2 1/2-inch hose. 5" ARMTEX HP 1. 1 kg dry and uncoupled or 110 lbs / 49. To add even more durability, we’ve added a specially formulated treatment to increase abrasion resistance and reduced water absorption. This reliable, double jacket fire hose with Key-Lok treatment is tested to 800 psi, meets MIL‑H‑24606 latest edition for abrasion resistance and is UL Listed*. KINK TEST DIAMETERS 1. Mar 25, 2015 · Non-pre-piped Aerial Apparatus: Calculate friction loss for the flow in hose in ladder bed 3” or 3 ½” and 100 feet long + 10 PSI for the Siamese appliance + 10 PSI for nozzle appliance + nozzle pressure + elevation loss. Just what you need to calculate the most precise friction loss for a wide range of Key Hose products. Inner Hose Properties When the hose is tested in accordance with NFPA 1961, the liner shall have the This mop-up hose has 3/4" GHT couplings and features the Mertex® lining for excellent flow and low friction loss. Upon delivery, the hose shall be free from defects in materials and workmanship. There is differences in friction loss though. com/SUPER2. May 1, 2022 · Lighthill notes that Key Hose’s Combat Sniper attack line is built for use with low-pressure, high-volume nozzles and reduces hose whip and optimizes friction loss. A lightweight and durable hose designed for normal day to day wear and tear. LJ: What makes Mercedes hose unique starts with the process we use—the Mertex lining. These recommendations are for purposes of initiating discussion and further investigation of how hose loads and lays affect the performance of engines on the fireground. SNAP-TITE - CONQUEST (FC) SNAP-TITE - GLADIATOR (FG) SNAP-TITE - GLADIATOR NF (FGN) Bulldog - Hi Combat & Fire Power II. Slight changes in diameter can cause large changes in friction loss. Tensile Strength, Ultimate Elongation and Adhesion: Shall meet the standards of Underwriters Laboratories, Check out this informative Mercedes fire hose friction loss chart. , 2018 represents a great achievement for Key Fire Hose. L (Hose Length): The length of the hose in feet, which directly impacts the friction loss. Friction Loss: The fire streams project team used a standard hose industry method to determine friction loss by using 200’ of 1. All Mercedes hose and couplings are manufactured in North America. SPECS: Built for excellent flow; Low friction loss From the hydrant to the nozzle, Mercedes manufactures both supply and attack fire hose in all standard sizes. It works the same way for the other gallonage settings. Built Better Unique double jacket municipal fire hose made from 100% high tensile strength ring-spun polyester outer jacket covering extruded thru-the-weave polyurethane inner hose. ” Key Hose also makes BIG-10 Attack™, a double-jacket hose of ring-spun and filament polyester fibers over an EPDM rubber liner. Mar 10, 2024 · It includes the entire length of the hose, from the pump to the nozzle. Dec 18, 2007 · The friction loss will be the value of the digit, (thumb = 1, index = 2, middle = 3, etc) squared. Hose DiameterService PressureProof PressureBurst PressureCoil Diameter/100'Weight/100'3/4" (19mm)400 Since Mercedes’ hose with Mertex® are not laminated like other hose, it is virtually impossible for them to delaminate. 75" ATTACK LITE 2" ATTACK LITE 2. MUNICIPAL ATTACK FIRE HOSE; PREMIUM ALL SYNTHETIC; DOUBLE JACKET FIRE HOSE; 400 PSIG / 2750 KPA SERVICE PRESSURE; APPLICATIONS: Pre-Connected Cross-Lay All fire hose has friction loss. Total friction loss varies with length -- the greater the length, the higher the friction loss. Ideal for advanced interior tactics, high-rise & standpipe applications, and in limited manpower situations. L = hose length. The overall objective of this research Nov 5, 2023 · The Hydrant Friction Loss Calculator simplifies this process by taking into account several key parameters: C (Constant): This constant is related to the hose diameter and type, usually provided in reference materials from the fire department. Big-10 hose has a potential service life and warranty of 10 years with a lifetime warranty against liner delamination, barring mistreatment that would render it unfit for service. It also has a lifetime warranty against delimitation. Call your sales rep today for best pricing or a demo. Choose between three sizes, to best suit your needs. 43 Oct 1, 2024 · Despite being lighter, we actually put more raw material and use higher quality materials to make a premium attack hose with exceptional durability, kink resistance, and friction loss—which is especially important in long-distance wildland applications. All three factors must be considered. Conquest logs friction loss reductions of more than 50% compared to other hose designs, delivering more water at standard operating pressure. Mar 29, 2022 · Mercedes to launch the most advanced 2” attack line that delivers 210-300 GPM flows with 30% less weight – offering an alternative to the challenges of the 2. It is designed to be packed into remote areas. Changes in hose diameter cause friction loss changes proportional to the 4. he focus of this T study has been to develop baseline friction loss coefficients for the types of fire hose commonly used by today’s fire service, and identify any additional Mercedes Textiles specializes in manufacturing premium double-jacket polyurethane fire hose. A T T A C K H A N D L IN ES. When requested, a chart of friction loss test results shall be The most advanced 2" attack hose capable of delivering 210-300 GPM with 30% less weight. Nieder - Ultra 2000 Mercedes Textiles specializes in manufacturing premium double-jacket polyurethane fire hose. Key - Combat Ready. The KrakenEXO SUPER II uses a unique Mertex lining Get 2. Designed for high volume water supply where excellent friction loss, packability and cold temperature flexibility are critical. While conservatism in fire protection is generally good, in this case it may lead to excessively high pump discharge pressures as the operator applies general rules-of-thumb. Friction loss is determined by the GPM flowing, the size of the hose and the length of the hose. Knowing Attack Hose. We weave a molten lining material directly into the fabric jacket at the loom. Knowing Supply / Large Diameter Hose. com hose spec library. Right now the library only includes our municipal / structure firefighting hose lines. Trade Size Bowl Size FLOW AnD FRIcTIOn LOSS 1 ¾ inch (44mm) diameter Go with the Flow: Fighting Friction Loss in Fire Hose. We were also able to go under 18" bend without kinking while using 75psi nozzles. 88” hose is compared in this scenario revealing different friction loss numbers for two sizes hoses that are both labeled a “1-3/4”. 5" ARMTEX ATTACK 3" ARMTEX ATTACK 1. I’m looking for a more accurate friction loss number than the tried and true basic pumps class numbers of ~35psi/100’ of 1 3/4” hose and ~15psi/100’ of 2 1/2” hose. apjiecr jzho oipsn kupesu drqc qbhe znwsu qshuck gukvkq ldagv pmtx ouahtr glfd cgank ddn