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LFTWH-UT-HCN-RV 3/4 - spec sheet
LFTWH-UT-HCN-RV 3/4 - spec sheet
Manufacturer Resources
Product Specs
- Body Material:
- Lead Free Copper Silicon Alloy
- Brand Name:
- Watts
- Cold Water Inlet Connection Size:
- 3/4 IN
- Cold Water Inlet Connection Type:
- Union Joint
- Cold Water Outlet Connection Size:
- 3/4 IN
- Cold Water Outlet Connection Type:
- Female Threaded
- Hot Water Inlet Connection Size:
- 3/4 IN
- Hot Water Inlet Connection Type:
- Female Threaded
- Hot Water Outlet Connection Type:
- Union Joint
- Lead Free:
- Yes
- Pressure Relief Valve:
- Yes
- Valve Type:
- Hot and Cold Water Set
- Department:
- Plumbing
- Product Group:
- Plumbing
- Product Subgroup:
- Valves
- Product Type:
- Relief Valve
Watts LFTWH-UT-HCN-RV 3/4 – Frequently Asked Questions
1) What connections do I need on a tankless heater to use the Watts LFTWH-UT-HCN-RV 3/4 service valve set?
Everything on the Watts LFTWH-UT-HCN-RV 3/4 kit is 3/4 inch. The cold side lands on the heater with a union joint inlet and gives you a 3/4 inch female threaded outlet to the cold supply. The hot side is the reverse: a 3/4 inch female threaded inlet from the heater and a union joint outlet to the hot distribution. So you need 3/4 inch threaded piping or adapters on both building-side connections, and the unions do the work at the appliance so you can break the heater out without cutting pipe.
2) Does the Watts LFTWH-UT-HCN-RV 3/4 tankless valve set include the T and P relief valve, or do I order that separately?
The relief valve is part of the set. The LFTWH-UT-HCN-RV 3/4 kit ships with a 150 psi relief valve on the hot side, so you are not sourcing a separate relief for the heater outlet. It is a hot and cold water valve set, meaning both service valves and the relief come as one assembly.
3) Can I flush a tankless heater through this Watts 3/4 inch valve set?
That is what the kit is built for. The LFTWH-UT-HCN-RV 3/4 is a tankless water heater hot and cold service valve set with union tailpieces at the heater, so you can isolate the unit and connect a descaling pump without disturbing the supply piping. Confirm your heater has 3/4 inch threaded hot and cold connections, since every port on this set is 3/4 inch.
4) What does the "HCN" no spring check mean on this Watts tankless valve kit, and when would I want the version with a check?
HCN is the no-check configuration: the cold side of this Watts set has no spring check valve built in. Choose it when the system already has backflow protection upstream, or when a closed system with a check and expansion tank is being handled elsewhere in the piping. If you need the check integral to the valve set, you want the Watts version that includes the spring check instead of this one. Both are 3/4 inch tankless service kits, and the difference is only that internal check.
5) Is the Watts LFTWH-UT-HCN-RV 3/4 valve set legal for potable water in states with lead-free plumbing rules?
Yes. The body is a lead free copper silicon alloy and the set is listed as lead free, so it is suitable for potable hot and cold water service on a residential or commercial tankless install.
6) What pressure is the relief valve on this Watts tankless kit set to?
150 psi. That is the relief setting supplied with the LFTWH-UT-HCN-RV 3/4 set, so match it against the maximum working pressure your tankless heater manufacturer calls for before installing.
7) What is the correct part number to order this Watts tankless service valve set?
Order Watts LFTWH-UT-HCN-RV 3/4. The UT denotes the female union tailpiece, HCN is the hot and cold set with no spring check, and RV indicates the 150 psi relief valve is included.
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Does the Watts LFTWH-UT-HCN-RV 3/4 come with a warranty?
Absolutely. The Watts LFTWH-UT-HCN-RV 3/4 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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