Z-Flex 4" Universal Appliance Adaptor with Back-Flow Preventer & Condensation Drain (2SVBFDPA04)

Very sturdy, quality craftsmanship and a must have if you have a tankless water heater. Well worth the money spent in not having to replace your water heater due to condensation/water damage.

Profuct was shipped quickly. Showed up without any damage. Looks to be welded well.

keep in mind that this goes with a particular type of vent pipe. Mine from Lowes did not fit so I sent this back

My Takagi tankless water heater recommended this specific piping. It's not particularly cheap, but this with the other recommended pieces (3 total) is really all I needed to properly vent my water heater.Do use this over what you'd find at Lowes/Home Depot. This is dual walled so it won't lava-melt your building.

No directions so dont be shy about knowing what your doing. Excellent fit and finish, It was nice shiney stainless steel and air tight (required for code). Fast shipping.

It does not come with the hose they show in the pic. Not a big deal but should be noted. The hose clamps that come with this product are garbage. They are too weak to actually tighten the pipe and I used the same brand vent pipe for every section. When I really went to snug the first clamp it broke. Went and bought high quality clamps that cost me a few bucks but they work. Would not buy this again if I had a choice.

It was easy to install and the directions on using the drain tube were straight forward.

We used this to install a tankless water heater.