Conbraco 78RV-114-125 Valve

The Conbraco 78RV-114-125 is a high-performance 3/4" NPT Thermal Expansion Relief Valve designed specifically to manage pressure spikes in residential and commercial water heating systems. Engineered as a robust alternative to bulky expansion tanks, this Apollo 78-RV series valve effectively handles thermal expansion by venting excess pressure, protecting the system from damage and ensuring compliance with IAPMO IGC 128 standards. As a direct replacement for 78-404-RV, this unit integrates a full-port isolation ball valve with a factory-set 125 PSI relief valve, streamlining installation by meeting two code requirements with a single compact device. Constructed from lead-free dezincification resistant (DZR) brass and bronze, it maintains high reliability in potable water applications with a maximum temperature rating of 210°F and a ball valve pressure rating of 400 PSI. The 3/8" hose barb relief connection allows for easy discharge piping, making it a staple for contractors prioritizing space-saving solutions and system longevity.

• Dual-Function Design: Combines a water heater isolation shut-off with a 125# thermal expansion relief device to save installation time and space.
• Lead-Free Reliability: Manufactured from NSF/ANSI 372 certified materials, including a C27451 DZR brass body and stainless steel relief spring.
• Compact Alternative: Serves as a code-approved alternative to expansion tanks, ideal for tight mechanical rooms or water heater retrofits.
• Maintenance-Free Seals: Features high-grade RTFE seats and stem packing with a silicone rubber relief seat for leak-free operation under high-temperature cycling.

Is the 78RV-114-125 a suitable replacement for the old 78-404-RV model?
Yes, this is the direct replacement for 78-404-RV, maintaining the same 3/4" NPT threading and 125 PSI relief setting for a seamless drop-in installation.

Can this valve replace a standard T&P safety relief valve?
No. This is a thermal expansion control valve intended to manage pressure increases from water heating; it does not replace the primary Temperature and Pressure (T&P) safety relief valve required by code on water heaters.

What are the connection specifications for the relief outlet?
The relief port features a 3/8" hose barb connection, allowing for a dedicated discharge line to be safely routed to a suitable drain according to local plumbing codes.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.