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WATTS M115-4 FL Automatic Control Pressure Regulator - Automatic Control Pressure Regulators
WattsAutomatic Control Pressure Regulators

WATTS M115-4 FL Automatic Control Pressure Regulator

The WATTS M115-4 FL is a 4-inch nominal pipe size automatic control pressure regulator, constructed with a ductile iron body. This flanged pressure reducing control valve is designed for a pressure range of 30 psi to…

SKU 3G-OTH-449757

Also listed as: M1154FL · M115 4 FL · M115-4-FL

Brand
Watts
Item
M115-4 FL Automatic Control Pressure Regulator
Part Number
M115-4 FL
Category
Automatic Control Pressure Regulators
Available to Order
Also known as:M115-4 FLWatts
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Technical Specifications

Watts
Manufacturer Part Number
M115-4 FL
Type
Flanged, 30 psi to 300 psi
Body Material
Ductile Iron

Technical Documents

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Watts Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The WATTS M115-4 FL is a 4-inch nominal pipe size automatic control pressure regulator, constructed with a ductile iron body. This flanged pressure reducing control valve is designed for a pressure range of 30 psi to 300 psi.

Frequently Asked Questions

What is the WATTS M115-4 FL pressure reducing control valve used for?

The WATTS M115-4 FL is an automatic control pressure regulator used to reduce and stabilize downstream pressure in industrial water, HVAC, and process systems. Its ductile iron body and flanged connections suit demanding applications requiring reliable pressure control from 30 psi to 300 psi.

What are the specifications of the WATTS M115-4 FL?

The WATTS M115-4 FL has a 4-inch nominal pipe size, flanged connections, and a ductile iron body. It operates within a 30 psi to 300 psi pressure range. The manufacturer part number is M115-4 FL, and it is classified as an automatic control pressure regulator.

Where to buy the WATTS M115-4 FL in worldwide?

3G Electric supplies the WATTS M115-4 FL pressure reducing control valve to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this ductile iron flanged regulator.

How to install the WATTS M115-4 FL pressure reducing valve?

Install the WATTS M115-4 FL in a horizontal pipe run with adequate support for the flanged connections. Ensure upstream pressure does not exceed 300 psi. Follow standard valve installation practices: isolate the line, use proper gaskets, and verify flow direction before pressurizing.

Used in

Common applications for Watts
Commercial plumbing – Watts standard capacity water pressure regulators (3/8 LF 26AB) for stabilizing incoming water pressure
Industrial steam systems – Watts 152A series steam pressure regulators for pressure reduction in process and heating lines
Cross-connection control – Watts 757 double check backflow preventers for commercial and industrial water supply protection
Boiler safety – Watts ASME Section XIII temperature and pressure relief valves for overpressure protection in heating systems
Hydronic heating – Watts CP16 pilot-operated pressure regulators for maintaining consistent pressure in steam or water loops
Water hammer mitigation – Watts LF15M2-A water hammer arrestors for absorbing surges in quick-closing valve applications
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Watts Products

3G Electric supplies Watts automatic control pressure regulators. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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