Product images: Amazon listings
Written from the listing's specs, not from our own use · How we rate
If you're after 3/4" isolation valves, the Leorossy Valve Kit (PRV 3/4"-1/2" NPT) delivers, with a pressure relief valve on top. Think of it for a new tankless install, so you can flush it later: 6.4/10 on what its listing documents.
| Brand | Leorossy |
|---|---|
| Category | Service kits, valves & parts |
| Connection | 3/4" |
| ASIN | B0GGBMS9ZB |
Full listing title: Leorossy Tankless Water Heater Valve Kit, PRV 3/4"-1/2" NPT
Rated from the listing's specs, no buyer reviews yet
What it's made for: a new tankless install, so you can flush it later.
Two valve kits close to it on our rating, each with a dated price.
The connection size the listing states. It has to match the water connections on your heater, or the kit won't thread on; the manual lists them.
What it has going for it
Relief valve. Most codes want a relief valve on a water heater. Check that its BTU rating covers your unit's input.
Lead-free brass. Required for anything on the drinking-water side in the US.
The listing names 3/4" connections, with a relief valve.
Find the size of your heater's hot and cold connections in its manual before you order: a mismatch means adapters, or a second trip to the store.
The seller states, word for word, in the Leorossy Valve Kit (PRV 3/4"-1/2" NPT) listing:
Featuring both 3/4-inch and 1/2-inch NPT adapters, the water heater flush kit accommodates a wide range of tankless water heater models.
Crafted from lead-free brass, the valves and adapters comply with standards for potable water systems.
Everything required for the valve installation is included: hot and cold isolation valves, pressure relief valves, 4 necessary adapters, and sealing tape.
The seller's words, quoted as written; we haven't checked them. Your heater's manual decides whether it fits.
What the Leorossy Valve Kit (PRV 3/4"-1/2" NPT) listing names:
Check these figures against your heater's manual before you order.
On Sep 30, 2026, that price put it in the pricier third of the 12 valve kits we have a recent price for.
The button opens the exact listing (ASIN B0GGBMS9ZB), where today's price, stock and seller apply.
Our take
The Leorossy Valve Kit (PRV 3/4"-1/2" NPT) earns its place with 3/4" isolation valves and a pressure relief valve. No buyer reviews yet, so this Leorossy valve kit has to win you over on paper. The catch with the Leorossy: the size has to match your heater's connections on both ends, or it simply won't thread on. We'd pick it if your tankless install has no service valves yet; otherwise, put it next to the Long Term 3/4" IPS Service Valve Kit first.
Before the Leorossy Valve Kit (PRV 3/4"-1/2" NPT) ships, check your connections: it is a 3/4" kit, and your heater's fittings have to match.
Read the size stamped on the heater's water connections, or in the manual's spec table, and match it to the kit.
Its BTU rating has to cover your heater's input.
Soldered or threaded, it goes on the drinking-water side: a plumber if you are not comfortable. Our installation guide explains the rest.
How the Leorossy Valve Kit (PRV 3/4"-1/2" NPT) stacks up against the closest alternative, the Long Term 3/4" IPS Service Valve Kit.
| Criterion | Leorossy Valve Kit, PRV 3/4"-1/2" NPT | Long Term 3/4" IPS Service Valve Kit |
|---|---|---|
| Our rating | 6.4/10 | 6.6/10 |
| Size | 3/4" | 3/4" IPS |
| Relief valve | Included | Included |
| Valve rating | Not stated | 500 WOG |
Pick the Long Term 3/4" IPS Service Valve Kit if you want our higher-rated option (6.6/10), with a higher WOG rating (500).
We rate it 6.4/10 (fair). The rating comes from its documented listing alone, as no customer-review record is captured yet.
Its listing states 3/4" isolation valves and a pressure relief valve. These are the seller's figures, not our measurements: whether it fits your exact heater is worth confirming first.
Your connections: read the size stamped on the heater's water connections, or in the manual's spec table, and match it to the kit. The relief valve: its BTU rating has to cover your heater's input. Who fits it: soldered or threaded, it goes on the drinking-water side: a plumber if you are not comfortable. Our installation guide explains the rest.
We link to the exact listing on Amazon, where today's price, stock and seller apply. It is an affiliate link, and it has no effect on the rating.
No, we haven't used it ourselves. Everything on this page comes from its listing, read line by line and weighed with our published formula.