Camco 40055 Brass RV Water Pressure Regulator

Here's the thing about shore water: you never really know what you're plugging into. One marina runs a gentle 45 PSI. The next dock, or an older campground with a booster pump, can push 90 or even 100 PSI down the hose. Your boat's freshwater system and an RV's plumbing are both built for a moderate range, and that kind of spike is exactly what splits a fitting or blows a line behind a bulkhead where you won't find it until the floor's already wet. The Camco 40055 sits between the spigot and your hose and takes that risk off the table.

It's a simple, honest piece of gear. Solid brass body, preset from the factory to hold your incoming water in the 40 to 50 PSI range. There's nothing to dial in and nothing to fuss with. You thread it on, connect your drinking-water hose to the other end, and the regulator quietly does its job every time you hook up. We like set-and-forget parts for exactly this reason. The stuff that protects your boat shouldn't need babysitting.

Why 40 to 50 PSI? That's the sweet spot for most coach and boat freshwater plumbing. High enough for a strong shower and a quick tank fill, low enough that your pump, hoses, and fittings aren't living under constant strain. Camco sets it there so you don't have to think about it. And a lot of the failures we see aren't one dramatic burst. They're months of a system quietly running 20 or 30 PSI too high until a seal finally gives up on a Tuesday afternoon.

The brass here is lead-free and safe for potable water, so you can run it on the same line you drink and cook from without a second thought. It also meets California and Vermont's low-lead brass-content rules, which are the strictest in the country. If a part passes those, it passes everywhere. The packaging comes labeled in English and French, so it's good to go whether you're cruising the Great Lakes or heading up into Canadian waters.

This is the no-gauge version, and that's worth understanding before you buy. It won't show you a live pressure reading. What it will do is hold the downstream pressure in that safe preset band. If you want to actually watch the incoming number, Camco makes a gauge-equipped version in the same family. But plenty of boaters and RVers don't care about the readout. They just want the protection, and for them the 40055 is the simpler, cleaner choice.

Installation takes about ten seconds. Standard garden-hose threads on both ends mean it connects to any typical white drinking-water hose and any standard dock or campground spigot. Hand-tight is usually enough. We tell people to put the regulator right at the spigot rather than at the boat, so the full length of your hose is protected too, not just the coach. A hose left in the sun under 90 PSI is its own little failure waiting to happen.

Who's this for? Anyone who moves around. If you keep your boat on one slip with known, sane dock pressure, you might never need it. But the second you start traveling, staying at transient docks, visiting different marinas, or splitting time between the water and a campground, a regulator earns its keep on the first bad spigot you hit. It's cheap insurance against an expensive, messy repair. Throw one in the dock box and forget about it until the day it saves you.

A quick note on care. Brass holds up well to weather and won't rot the way a plastic body can, but if you're storing the boat for winter, pull the regulator, drain it, and keep it somewhere it won't freeze. Trapped water freezing inside any brass fitting can crack it. Do that and this little regulator will outlast a lot of the gear on your boat.