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Watts Temperature and Pressure Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in Connection Size - ASME Section IV Temperature & Pressure Relief Valves
WattsASME Section IV Temperature & Pressure Relief Valves

Watts Temperature and Pressure Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in Connection Size

The WATTS Temperature and Pressure Relief Valve is an ASME Section IV rated valve with a 3/4 in MNPT x 3/4 in FNPT connection size. Its body is constructed of brass, as specified by manufacturer part number 3/4 LF…

SKU 3G-OTH-437108

Also listed as: 34LF100XL4 · 3 4 LF 100XL 4 · 3-4-LF-100XL-4

Brand
Watts
Item
Temperature and Pressure Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in Connection Size
Category
ASME Section IV Temperature & Pressure Relief Valves
Available to Order
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

Watts
Manufacturer Part Number
3/4 LF 100XL-4
Type
Brass
Body Material
Brass
Connection Size
3/4 in x 3/4 in

Technical Documents

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

Product Description

The WATTS Temperature and Pressure Relief Valve is an ASME Section IV rated valve with a 3/4 in MNPT x 3/4 in FNPT connection size. Its body is constructed of brass, as specified by manufacturer part number 3/4 LF 100XL-4.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is a Watts temperature and pressure relief valve used for?

A Watts temperature and pressure relief valve protects water heaters and storage tanks from excessive temperature or pressure. It automatically opens to relieve steam or water when conditions exceed safe limits, preventing catastrophic failure. This ASME Section IV rated brass valve is common in commercial and residential hot water systems.

What are the specifications of the Watts 3/4 LF 100XL-4 valve?

The Watts 3/4 LF 100XL-4 is an ASME Section IV temperature and pressure relief valve with a brass body. It has a 3/4 in MNPT x 3/4 in FNPT connection size. The manufacturer part number is 3/4 LF 100XL-4. It is designed for use on water heaters and storage tanks requiring overpressure and overtemperature protection.

Where to buy a Watts temperature and pressure relief valve worldwide?

3G Electric supplies the Watts 3/4 LF 100XL-4 temperature and pressure relief valve to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. As a global industrial solutions provider, we source genuine Watts valves and support procurement across 14 industrial departments. Contact us for availability and lead time.

How to install a Watts temperature and pressure relief valve?

Install the Watts valve directly into the water heater or tank tapping using thread sealant on the male NPT end. Ensure the discharge pipe is directed downward and terminates in a safe, visible location per local codes. Never install a shutoff valve between the relief valve and the tank. Test operation after installation by lifting the lever briefly.

Used in

Common applications for Watts
Industrial burner gas safety systems — Watts HF2000 filters with GF-series seal kits maintain clean, regulated gas supply to burner pilot and main flame controls
Commercial heating and boiler installations — Modular filter assemblies support preventive maintenance and component replacement without full system shutdown
Process gas delivery pipelines — DN25 through DN125 filter bodies accommodate varying flow rates and inlet pressures across manufacturing and chemical processes
Gas pressure regulation benches — Multi-stage Watts filter platforms integrate with pressure reducers and safety shutoff valves in test and calibration environments
Equipment retrofit and upgrade projects — Available connection sizes and seal kits enable adaptation of newer Watts components into legacy gas control systems
Planned maintenance and spare-parts inventory — Filter seal kits allow facilities to stock consumables in advance, reducing downtime during scheduled gas system servicing

Watts Products

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

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Compatible alternatives & equivalents

Cross-referenced by specification & description
WATTS Temperature and Pressure Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in Connection Size (MPN LF100XL-4 M7)
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WATTS Temperature and Pressure Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in Connection Size (MPN LF100XL-4 M7)
WATTS Temperature and Pressure Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in Connection Size, Brass (MPN 100XL-4)
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WATTS Temperature and Pressure Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in Connection Size, Brass (MPN 100XL-4)
WATTS Temperature and Pressure Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in Connection Size, Brass (MPN 3/4 100XL-075210)
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WATTS Temperature and Pressure Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in Connection Size, Brass (MPN 3/4 100XL-075210)
WATTS Temperature and Pressure Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in Connection Size (MPN 3/4 LF100XL 175-210)
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WATTS Temperature and Pressure Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in Connection Size (MPN 3/4 LF100XL 175-210)
WATTS Temperature and Pressure Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in Connection Size, Brass (MPN 3/4 100XL-175/210)
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WATTS Temperature and Pressure Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in Connection Size, Brass (MPN 3/4 100XL-175/210)
WATTS Temperature and Pressure Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in Connection Size (MPN 3/4 LF100XL 125-210)
Watts
WATTS Temperature and Pressure Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in Connection Size (MPN 3/4 LF100XL 125-210)

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This ASME Section IV temperature and pressure relief valve features a brass body and MNPT x FNPT connections. It is designed to automatically relieve excess temperature or pressure in water heaters and storage tanks, helping prevent system failure in commercial and industrial hot water systems
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