Rinnai MIVK-T-LW Tankless Isolation Valve Kit

What it delivers

The Rinnai MIVK-T-LW Tankless Isolation Valve Kit is a pair of tankless service valves for flushing and isolating the heater.

With isolation valves on both lines, descaling is a hose-on, hose-off job; the hot-side valve usually carries the relief valve port.

Match the connection type (threaded IPS, sweat or push-fit) and size, usually 3/4 inch, to the heater and the pipe; most kits put the relief valve port on the hot side.

Listed details: material: Brass; model: MIVK-T-LW.

The listing gives dimensions of 5 x 5 x 7 inches, a weight of 2 lb and 1 matsui plumbing isolation valve kit in the box.

Right unit for this house?

Strengths and trade-offs

Install limits

• Figures are the maker's or seller's own. Flow at a rise is our estimate from the input; gas, venting and electrical work needs a licensed professional.

Rated performance

Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.

Rival units at this flow

Webstone P704RLF134 Tankless Isolation Valve KitAnother isolation valve kit.

Hourleey LUG8HVZ609 Tankless Isolation Valve KitAnother isolation valve kit.

GUOFIS TOOL028-1 Tankless Isolation Valve KitAnother isolation valve kit.

More descaling and maintenance kits rated for similar demand

• FOGATTI 52423 Tankless Isolation Valve Kit
• MIZUDO FSSVKB-1 Tankless Isolation Valve Kit
• Watts LF-TWH-HCN-RV 3/4 Tankless Isolation Valve Kit
• SharkBite 25374 Tankless Isolation Valve Kit

Full descaling and maintenance kits spec grid · Every Rinnai unit in the catalog

Final verdict

A well-specified isolation valve kit for new tankless installs.

Buy this unit

Our links open this exact model's product page. Prices and stock change; check what's included before you order.

Questions buyers ask