Clear every drop of water from your RV plumbing before the freeze hits. The Valterra P23518LFVP threads directly into your rig's city water inlet and accepts any standard air compressor fitting via its built-in Schrader valve -- the same valve stem used on automotive tires. The result is a fast, controlled blow-out that protects pipes, fittings, and appliances from freeze damage all winter long.
Skipping a proper blow-out and relying on antifreeze alone leaves standing water in low spots, pump chambers, and water heater bypass lines. The P23518LFVP gives you a reliable air path into the freshwater system so you can push that residual water out through every open faucet, shower head, and toilet valve before temperatures drop.
Made from lead-free brass, this plug is durable enough to store in your tool kit season after season without corroding or seizing. The Schrader valve core means your air hose quick-connect stays in place even when you move between fixtures -- no need to keep reconnecting at the inlet.
Complies with low-lead standards. Safe for potable water systems and durable enough for repeated seasonal use without corrosion or thread galling.
Standard automotive-style valve accepts any air compressor quick-connect fitting. No proprietary adapters needed -- works with shop compressors, portable units, and pancake compressors.
Threads directly into the standard 3/4 in. GHT (garden hose thread) city water inlet found on the vast majority of RVs, campers, and motorhomes.
The Schrader valve lets you keep the air line attached while opening fixtures throughout the coach -- no need to return to the inlet between each fixture.
Winterizing with compressed air is straightforward when you follow the right sequence:
Compressed air evacuation removes water physically -- not by dilution. When used correctly ahead of antifreeze treatment, it significantly reduces the volume of antifreeze needed and ensures lines are fully cleared in low spots where gravity and antifreeze alone may not reach.
Most RV freshwater lines, fittings, and valves are rated for potable water service, not high-pressure air. Keep your compressor regulator set between 30 and 50 PSI during blow-out. Exceeding 50 PSI risks damaging pipe joints, valve seats, and pump diaphragms. A regulated compressor or an inline pressure regulator is strongly recommended.
The 3/4 in. GHT (female garden hose thread) city water inlet is the industry standard across travel trailers, fifth wheels, Class A, Class B, and Class C motorhomes. If your RV has a standard exterior water hookup port, this plug will fit it.
After blow-out season, cap the Schrader valve with the small rubber or metal dust cap from your original valve core to keep debris out of the air port. Store the plug in your winterization kit alongside your water heater bypass kit and antifreeze hand pump for a complete annual service setup.