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Watts water hammer arrestors absorb shock when water flowing in a piping system suddenly stops due to fast closing shutoff valves, dishwashers and cloth washers. These water hammer arrestors protect against the potentially damaging effects of water hammers.
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H| Style | Model | Body Material | Connection Type | Diameter | Factory Set Pressure | Max. Working Pressure | Mfr. Series | Overall Height | Overall Width | Price (inc. GST) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | LF05-S 3/4 | Copper | Socket | - | 60 psi | 10 Bar | LF05 | 4.88" | 1" | SGD 166.49 | |
| B | LF05A-CH 3/4 | Copper | Female Threaded | - | 60 psi | 10 Bar | LF05 | 5.625" | 1.25" | SGD 174.45 | |
| C | 1 LF15M2-D | Copper with Low-Lead Brass Adapter | MNPT | 2.125" | 60 psi | - | - | 9 15/16" | - | SGD 319.60 | |
| D | 1 LF15M2-E | Copper with Low-Lead Brass Adapter | MNPT | 2.125" | 60 psi | - | - | 12 11/16" | - | SGD 443.20 | |
| E | LF15M2-A | Copper with Low-Lead Brass Adapter | MNPT | 1.125" | 60 psi | - | - | 5 15/16" | - | SGD 68.87 | |
| F | LF15M2-F | Copper with Low-Lead Brass Adapter | MNPT | 2.625" | 60 psi | - | - | 11.156" | - | SGD 568.43 | |
| G | LF150A-HA 3/4 | Stainless Steel | Male Hose Threaded | - | 30 psi | 10.3 Bar | LF150A | 4.3125" | 3.4062" | SGD 286.29 | |
| H | LF150A | Stainless Steel with Brass Adapter | MNPT | 4 13/32" | 25 to 35 psi | - | - | 4-5/16" | - | SGD 184.52 |
When a shutoff valve, dishwasher, faucet or washer closes quickly and stops the flow, the momentum it creates shakes and pounds pipes. Watts water hammer arrestors are designed to prevent this condition by employing a cushion of air that can effectively absorb the momentum. These water hammer arrestors prevent noise and damaging effects of water hammers to the pipes, making them ideal for commercial and industrial applications. Watts water hammer arrestors feature a copper body and come with a lead free, brass built threaded adapter for easy installation in a new or existing piping system, at any desired angle.
Watts water hammer arrestors are used with dishwashers, cloth washers and faucet water systems.
Water develops momentum as it flows quickly through pipes. When a valve closes quickly and stops the flow, that momentum shakes and pounds pipes. Watts water hammer arrestors cure this condition with a cushion of air that absorbs the momentum. Before you install a Watts water hammer arrestor, determine which faucet or valve is causing the noise.
Watts water hammer arrestors comply with ASSE, CSA, FM, NSF, UL, ULC, USC and WQA standards.
Depending on the piping arrangement, Watts water hammer arrestors can be positioned in various locations. Ideally, the hammer might either originate from the pump / check valve / isolation, or it might originate from the point where the pipe turns, such as at the top of a pump riser. When the branch line exceeds a length of 20 ft, additional Watts water hammer arrestors must be installed.
When a valve closes fast and stops the flow, momentum shakes and pounds the pipes. A water hammer arrestor works by cushioning the impact with air so that the momentum is absorbed.
Water hammer arrestors can be installed vertically, horizontally, or at any angle in between. When installing an arrestor, it is important to place it as close as possible to the valve.
Water hammer arrestors are required on any valves where a plastic pipe is used for water distribution, which indicates that they are not required for PVC and PEX.
Vibrations caused by shocks in the piping system may be avoided by installing a water hammer arrestor near the quick closing valve.
Watts water hammer arrestors will absorb shock and minimise the slamming noise, while a soft seat in the check valve will ensure quiet closure.