We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

3G Electric
Watts ASME Section XIII Hot Water Pressure Relief Valve - ASME Section XIII Hot Water Pressure Relief Valves
WattsASME Section XIII Hot Water Pressure Relief Valves

Watts ASME Section XIII Hot Water Pressure Relief Valve

The WATTS Pressure Relief Valve is an ASME Section XIII hot water pressure relief valve with FNPTF x FNPTF connections, available in a 1 in x 1 1/4 in iron configuration. It has a maximum operating pressure of 40 psi…

SKU 3G-OTH-442534

Also listed as: F 382870 · F-382870

Brand
Watts
Item
ASME Section XIII Hot Water Pressure Relief Valve
Part Number
F382870
Category
ASME Section XIII Hot Water Pressure Relief Valves
Available to Order
Also known as:F382870Watts
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

Watts
Manufacturer Part Number
F382870
Type
1 in x 1 1/4 in, Iron
Max. Op Pressure
40 psi

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The WATTS Pressure Relief Valve is an ASME Section XIII hot water pressure relief valve with FNPTF x FNPTF connections, available in a 1 in x 1 1/4 in iron configuration. It has a maximum operating pressure of 40 psi (MPN F382870).

Frequently Asked Questions

What is the WATTS F382870 pressure relief valve used for?

The WATTS F382870 is an ASME Section XIII hot water pressure relief valve used in commercial and industrial hydronic systems. It protects boilers, water heaters, and storage tanks from overpressure by automatically releasing water when system pressure exceeds 40 psi, preventing equipment damage and ensuring safe operation.

What are the specifications of the WATTS F382870 pressure relief valve?

The WATTS F382870 is a 1 in x 1 1/4 in FNPTF x FNPTF iron pressure relief valve with a maximum operating pressure of 40 psi. It is ASME Section XIII certified for hot water service. The valve body is constructed from cast iron, and the inlet/outlet connections are female NPT threads.

Where to buy the WATTS F382870 pressure relief valve worldwide?

3G Electric supplies the WATTS F382870 pressure relief valve worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your site. Contact our team for a quote and lead time. We source genuine WATTS components for commercial and industrial applications.

How to install a WATTS pressure relief valve?

Install the WATTS valve in the hot water system's top or side tapping, ensuring the discharge pipe is directed to a safe drain location. Use pipe thread sealant on the FNPTF connections. Never install a shutoff valve between the relief valve and the system. Test operation after installation by lifting the lever briefly.

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
Not sure this is the right part? Photo-identify it→

Watts Products

3G Electric supplies Watts asme section xiii hot water pressure relief valves. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Compatible alternatives & equivalents

More from Watts

View all Watts parts →
ASME Section XIII certified hot water pressure relief valve with 1 in FNPTF x 1 in FNPTF connections. Constructed from copper silicon alloy. Maximum operating pressure 150 psi. Used in commercial and industrial hydronic systems to protect water heaters, boilers, and storage tanks from overpressure
Watts
ASME Section XIII certified hot water pressure relief valve with 1 in FNPTF x 1 in FNPTF connections. Constructed from copper silicon alloy. Maximum operating pressure 150 psi. Used in commercial and industrial hydronic systems to protect water heaters, boilers, and storage tanks from overpressure
Watts
Watts
This ASME Section XIII hot water pressure relief valve features a 1 1/4 in x 1 1/2 in NPTF x NPTF iron body. Rated for a maximum operating pressure of 30 psi, it automatically opens to discharge excess water and prevent overpressure in hot water systems. Suitable for use in commercial and industrial water heating applications
Watts
Watts
This ASME Section XIII certified pressure relief valve is designed for hot water service on pressure vessels such as water heaters and boilers. The iron body features NPTF connections (2 in inlet x 2 1/2 in outlet) and opens automatically at its 30 psi set pressure to discharge excess water, preventing overpressure damage. Suitable for commercial and industrial hot water systems
ASME Section XIII hot water pressure relief valve with FNPTF x FNPTF connections. Cast iron body. Opens automatically when system pressure exceeds 20 psi to protect hydronic heating systems from overpressure
Watts
ASME Section XIII hot water pressure relief valve with FNPTF x FNPTF connections. Cast iron body. Opens automatically when system pressure exceeds 20 psi to protect hydronic heating systems from overpressure
This Watts 174A pressure relief valve is ASME Section XIII certified for hot water service. It features a bronze body with 1-inch FNPTF x FNPTF connections and a maximum operating pressure of 150 psi. The valve automatically opens at its set pressure to discharge excess water, protecting water heaters and storage tanks from overpressure in hydronic heating systems
Watts
This Watts 174A pressure relief valve is ASME Section XIII certified for hot water service. It features a bronze body with 1-inch FNPTF x FNPTF connections and a maximum operating pressure of 150 psi. The valve automatically opens at its set pressure to discharge excess water, protecting water heaters and storage tanks from overpressure in hydronic heating systems
This ASME Section XIII certified hot water pressure relief valve features a bronze body and 2-inch FNPTF x FNPTF connections. It automatically releases water when system pressure exceeds 150 psi, protecting boilers, water heaters, and storage tanks in commercial and industrial hydronic systems
Watts
This ASME Section XIII certified hot water pressure relief valve features a bronze body and 2-inch FNPTF x FNPTF connections. It automatically releases water when system pressure exceeds 150 psi, protecting boilers, water heaters, and storage tanks in commercial and industrial hydronic systems
This Watts pressure relief valve is ASME Section XIII rated for hot water service. It features a 3/4 in x 3/4 in FNPTF iron body and a maximum operating pressure of 10 psi. Used to protect water heaters and storage tanks from overpressure by automatically opening at set pressure
Watts
This Watts pressure relief valve is ASME Section XIII rated for hot water service. It features a 3/4 in x 3/4 in FNPTF iron body and a maximum operating pressure of 10 psi. Used to protect water heaters and storage tanks from overpressure by automatically opening at set pressure
Watts
Watts
ASME Section XIII hot water pressure relief valve with 1 1/2 in NPTF inlet and 2 in NPTF outlet, constructed of iron. Maximum operating pressure of 30 psi. Overall height of 9 1/4 in. Used to protect hot water heaters and boilers from overpressure conditions in commercial or industrial systems

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first