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Product Description


1/2 Inch High Capacity Water Pressure Regulator
This Feed Water Pressure Regulator can be installed vertically or horizontally but must be installed on the cold water supply line leading to the boiler. Before installing the regulator, flush the water supply line to remove debris, scale and dirt, leaving enough space to operate the quick fill and purge lever
Detailed Installation Steps for S1156F Boil Water Pressure Regulator
STEP 01 | This Feed Water Pressure Regulator must be installed on the cold water supply line to the boiler. It may be installed in either vertical or horizontal position. Allow sufficient clearance to operate the fast fill and purge lever |
STEP 02 | Install a shutoff valve upstream of the regulator. (Notice: Local codes typically require the use of a backflow preventer in the system Model 9D. Consult local authorities for the type, installation and testing requirements. The backflow preventer must be installed upstream of the regulator) |
STEP 03 | Prior to installing the regulator, flush out the supply pipe to clear it of chips, scale, dirt, etc |
STEP 04 | Install the Watts regulator in the supply line to the boiler with the arrow on the valve body pointing in the direction of flow to the boiler |
For S1156F Boil Water Pressure Regulator 1/2"

Well-designed Replacement
- It is a part of the 1156F Series, Feed Water Pressure Regulator
- Designed to replace for 1156F, B1156F, S1156F, SB1156F
- 1/2 in Nominal

Item Specification
- Inlet/Outlet Connection Size: 1/2 IN; Inlet Connection Type: Union Joint
- Maximum Working Pressure: 100 PSI (6.9 BAR)
- Maximum Operating Temperature: 100℃ (212℉); Minimum Temperature: 0.5℃ (33℉)
- Outlet Connection Type: Female Threaded; Outlet Thread Type: NPT

Great Features
- Made of stainless steel, bronze, plastic and rubber
- With tight seating check valve, purge lever for manual purging, and a stainless steel strainer
- It also features high capacity performance and simplified servicing design

Regulator Function
- Designed to fill the boiler and system piping with water in commercial and residential hydronic heating systems
- To maintain water pressure in the system at all times
- It can also provide reserve water to the system if a leak occurs
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