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MIFAB Hammergard WHB-series Water Hammer Arrestor bellows type

Original price $229.00 - Original price $233.95
Original price
$229.00 - $233.95
Current price $229.00


MIFAB Hammergard WHB Series nesting bellows type of water hammer arrestor. Male NPT threaded connection. The bellows and body casing are made of Type 304 stainless steel. MIFAB WHB Series is certified to the PDI WH-201 Standard. Engineered to limit line system surge pressure up to 1500 PSIG.

MIFAB WHB hammer arrestors can be installed in commercial, institutional and residential applications on water supply lines to reduce water hammer caused by the quick opening and closing of valves within the piping system. The resulting hydraulic shock waves can lead to broken pipes and effect valves in appliances if not reduced with the use of the water hammer arrestor. Stainless steel bellows operated piston ensures long life for performance and maximum operating efficiency.

When water flow velocity suddenly changes, Mifab stainless steel bellow-style gives complete protection against water hammer. Available in common pipe diameters for varying pipe lengths.

Here are common situations when flow rate can change so fast that water hammer happens:

≈ Quick closing, solenoid-actuated valves used with sinks, lavs, dishwashers, and automatic residential washers
≈ Improperly adjusted water closet flush valves
≈ Pumping systems
≈ Drinking fountains or similar furnishings where water flow usage is valved for intermittent operation

MIFAB's bellows contain air cushions that are hermetically sealed within the unit. There is no loss of air due to leaking or permeation through worn seals. Other hammer arrestors with elastomeric parts will wear out faster. In addition, Mifab's 304 stainless steel construction prevents corrosion from chloramine and other common water supply chemicals.


ANSI Specifications ANSI A112.26.1M
Model series WHB-A
End Connection 1 Male Threaded
Fitting Size 1 3/4 in
Height 3.5 in
Length 4 7/10 in
Material 304 stainless steel
Maximum Pressure 125 psi
Maximum Temperature 300


MIFAB Hammergard WHB-series Spec Sheet

Mifab Water Hammer Arrestors pipe threads are accurately machined to ensure a good seal. Always install in an upright position on a horizontal run of piping.