Watts (LF15M2A) Mini Water Hammer Arrestor - Pressure Regulator 1/2" NPT NSF Certified - Lead Free
Mini Water Hammer Arrestor with Pressure Regulation
Piston-Based Shock Absorption
Sudden Flow Change Detected
When a valve closes rapidly, water velocity changes instantly and creates a hydraulic shockwave that propagates backward through the supply line toward the arrestor.
Piston Compresses Air Chamber
The shockwave enters the copper body and pushes against a brass piston, compressing the factory-charged air cushion behind it. This converts kinetic energy into potential energy.
Pressure Returns to Baseline
As the compressed air expands, the piston returns to its neutral position and the energy dissipates harmlessly. EPDM seals maintain the air charge and prevent water intrusion.
Technical Details
| Model Number | Watts LF15M2A |
| Connection Type | 1/2" NPT male threaded |
| Maximum Working Pressure | 150 PSI (10.3 bar) |
| Body Material | Copper body, brass piston and cap |
| Seals | EPDM O-rings and seals |
| Air Charge | Factory charged, non-rechargeable |
| Certifications | NSF Certified, ASSE/ANSI approved, PDI certified, IAMPO listed |
| Installation Orientation | Any angle with standard pipe tee |
Applications and Installation
The Watts LF15M2A installs in commercial and residential plumbing systems using a standard 1/2" NPT pipe tee. Ideal for commercial dishwashers, clothes washers, and any quick-closing solenoid valves that produce water hammer. Install as close as possible to the source of the shock for maximum effectiveness—typically within 6 feet of the problem fixture or appliance. The compact design allows concealed installation in tight spaces behind appliances or within wall cavities. Compatible with both new construction and retrofit applications in copper, PEX, or CPVC supply lines. Optional 15AK adapters available for alternate mounting configurations.
Mini Water Hammer Arrestor with Pressure Regulation
Piston-Based Shock Absorption
Sudden Flow Change Detected
When a valve closes rapidly, water velocity changes instantly and creates a hydraulic shockwave that propagates backward through the supply line toward the arrestor.
Piston Compresses Air Chamber
The shockwave enters the copper body and pushes against a brass piston, compressing the factory-charged air cushion behind it. This converts kinetic energy into potential energy.
Pressure Returns to Baseline
As the compressed air expands, the piston returns to its neutral position and the energy dissipates harmlessly. EPDM seals maintain the air charge and prevent water intrusion.
Technical Details
| Model Number | Watts LF15M2A |
| Connection Type | 1/2" NPT male threaded |
| Maximum Working Pressure | 150 PSI (10.3 bar) |
| Body Material | Copper body, brass piston and cap |
| Seals | EPDM O-rings and seals |
| Air Charge | Factory charged, non-rechargeable |
| Certifications | NSF Certified, ASSE/ANSI approved, PDI certified, IAMPO listed |
| Installation Orientation | Any angle with standard pipe tee |
Applications and Installation
The Watts LF15M2A installs in commercial and residential plumbing systems using a standard 1/2" NPT pipe tee. Ideal for commercial dishwashers, clothes washers, and any quick-closing solenoid valves that produce water hammer. Install as close as possible to the source of the shock for maximum effectiveness—typically within 6 feet of the problem fixture or appliance. The compact design allows concealed installation in tight spaces behind appliances or within wall cavities. Compatible with both new construction and retrofit applications in copper, PEX, or CPVC supply lines. Optional 15AK adapters available for alternate mounting configurations.
Description
Mini Water Hammer Arrestor with Pressure Regulation
Piston-Based Shock Absorption
Sudden Flow Change Detected
When a valve closes rapidly, water velocity changes instantly and creates a hydraulic shockwave that propagates backward through the supply line toward the arrestor.
Piston Compresses Air Chamber
The shockwave enters the copper body and pushes against a brass piston, compressing the factory-charged air cushion behind it. This converts kinetic energy into potential energy.
Pressure Returns to Baseline
As the compressed air expands, the piston returns to its neutral position and the energy dissipates harmlessly. EPDM seals maintain the air charge and prevent water intrusion.
Technical Details
| Model Number | Watts LF15M2A |
| Connection Type | 1/2" NPT male threaded |
| Maximum Working Pressure | 150 PSI (10.3 bar) |
| Body Material | Copper body, brass piston and cap |
| Seals | EPDM O-rings and seals |
| Air Charge | Factory charged, non-rechargeable |
| Certifications | NSF Certified, ASSE/ANSI approved, PDI certified, IAMPO listed |
| Installation Orientation | Any angle with standard pipe tee |
Applications and Installation
The Watts LF15M2A installs in commercial and residential plumbing systems using a standard 1/2" NPT pipe tee. Ideal for commercial dishwashers, clothes washers, and any quick-closing solenoid valves that produce water hammer. Install as close as possible to the source of the shock for maximum effectiveness—typically within 6 feet of the problem fixture or appliance. The compact design allows concealed installation in tight spaces behind appliances or within wall cavities. Compatible with both new construction and retrofit applications in copper, PEX, or CPVC supply lines. Optional 15AK adapters available for alternate mounting configurations.
