Camco 40058 Adjustable Brass Water Pressure Regulator
Camco 40058 Adjustable Brass Water Pressure Regulator — Product description
The Camco 40058 is an adjustable brass water pressure regulator that sits between the dockside spigot and your boat's freshwater inlet. It ships factory preset to 45 PSI and protects your hose, pump, and onboard plumbing from the pressure spikes that marina and city water lines throw at you.
Marina water pressure is a gamble. One dock runs a gentle 40 PSI, the next slams your inlet with 90 or more, and your onboard plumbing pays the price. The Camco 40058 adjustable brass water pressure regulator sits between the shore spigot and your freshwater inlet and takes that guesswork off the table. It arrives factory preset to 45 PSI, a safe, comfortable pressure for most boats and RVs, and you can dial it from there if you want more flow or a gentler feed.
Here's why it matters. High or inconsistent water pressure is one of the most common causes of burst hoses, blown fittings, and a tired freshwater pump working against a load it was never rated for. Drop this regulator inline at the hookup and you cap the incoming pressure before it ever reaches your hose or your boat's internal lines. That's cheap insurance for an expensive plumbing system.
The body is solid brass, so it holds up to season after season of dockside duty far better than the plastic inline regulators you'll find in the same aisle. Brass shrugs off the constant thread-on, thread-off cycle and the corrosion that comes with life on the water. Thread it onto the spigot, run your drinking-water hose to the outlet side, and you're set.
One thing to know up front: the 40058 does not have a built-in check valve. That keeps the design simple and the flow strong, but it means water can move back through the regulator if downstream pressure ever exceeds the supply. If your setup shares a freshwater tank or you're running a pump that could push back against the line, add a separate spring check valve downstream. For a straightforward city-water or dockside hookup, you won't miss it.
Because it's adjustable, the 40058 is a step up from the fixed brass regulators a lot of boaters start with. Want a stronger shower at the dock? Turn it up. Feeding an older system you'd rather baby? Bring it down. A word from experience: the preset can drift a little over a season of hard use, so it's worth checking it against an inline pressure gauge once a year and re-dialing if needed. Takes two minutes.
This is the same regulator RVers trust at the campground, and it does the exact same job at the marina freshwater stand. If you liveaboard, cruise, or just top off the tank at the dock, it belongs in your dock line. And when it's time to winterize, remember there's no check valve holding water in the body, so it drains and blows out clean along with the rest of your freshwater lines. Just don't forget to pull it and store it somewhere it won't freeze solid.
Installation is about as simple as it gets. Hand-tighten the inlet onto the shore or dock spigot, connect your potable-water hose to the outlet, and open the tap. There's no wiring, no tools, and nothing to calibrate out of the box since it comes preset. If you want to fine-tune the pressure, back the tap off, adjust the setting, and bring it back up while watching a gauge. Most boaters find 40 to 50 PSI is the sweet spot for good flow without stressing the system.
A few care notes keep it working like new. Sediment and grit in dock water can settle on the seat over time, so if you ever notice the pressure creeping or the flow dropping off, an inline strainer ahead of the regulator keeps debris out and extends its life. Mounting it so the body stays clear of standing sediment helps too. And since it's brass, a quick rinse and dry before long-term storage keeps the threads clean and the finish honest.
Key Features
- Factory preset to 45 PSI out of the box, a safe, comfortable pressure for most boats and RVs
- Fully adjustable, so you can dial pressure up for more flow or down to baby an older system
- Solid brass body stands up to constant dockside thread-on, thread-off use and the corrosion that comes with life on the water
- No built-in check valve keeps flow strong and the design simple, pair with a downstream check valve if your setup needs backflow protection
- Protects your drinking-water hose, freshwater pump, and onboard plumbing from high or inconsistent supply pressure
- Installs inline at the shore or dock spigot with no tools and no wiring
- Threads onto a standard water hose connection, so it works with common potable-water hoses
Why Buy from NVN Marine
- Authorized Camco reseller, full manufacturer warranty
- NMEA member and ABYC certified, advice from real boat techs
- Same-day shipping before 3 PM ET on in-stock items
- NY headquarters and Fort Lauderdale flagship retail store
Technical specifications
| Title | Camco 40058 Adjustable Brass Water Pressure Regulator |
|---|---|
| Brand | Camco |
| Manufacturer | Camco |
| Manufacturer Part Number | 40058 |
| UPC | 014717400589 |
| Body Material | Brass |
| Regulator Type | Adjustable Water Pressure Regulator |
| Factory Preset Pressure | 45 PSI |
| Adjustable | Yes |
| Built-In Check Valve | No |
| Application | Freshwater dockside / city water hookup |
| Protects | Water hose, pump, and internal water lines |
Frequently asked questions
What pressure is the Camco 40058 set to out of the box?
It ships factory preset to 45 PSI, a safe, comfortable pressure for most boats and RVs. Because it's adjustable, you can raise or lower it from there to suit your system.
What PSI should I set a water pressure regulator to?
Most boaters find 40 to 50 PSI is the sweet spot for good flow without stressing hoses, fittings, or the freshwater pump. The 40058's 45 PSI preset lands right in that range, so many people never need to touch it.
Does the 40058 have a built-in check valve?
No. It does not include a built-in check valve. That keeps flow strong and the design simple, but it means water can move back through the regulator if downstream pressure exceeds the supply. If your setup shares a freshwater tank or runs a pump that could push back against the line, add a separate spring check valve downstream.
Is 70 PSI too high for my boat's water system?
For most onboard plumbing, yes, 70 PSI is higher than you want to run day to day. It stresses hoses, fittings, and the pump. Capping incoming pressure at the 40058's 45 PSI preset keeps things comfortable and protects the system.
What is the maximum water pressure most plumbing systems should see?
Common practice keeps static water pressure well under 80 PSI to protect fixtures and plumbing. Running your boat at the 40058's 45 PSI preset stays comfortably below that, which is exactly why a regulator at the hookup matters.
Will this work for both boats and RVs?
Yes. It's the same regulator RVers use at the campground water stand, and it does the identical job at the marina freshwater hookup. Any freshwater city-water or dockside connection is fair game.
Is the body really solid brass?
Yes, the 40058 is a solid brass regulator. Brass holds up to the constant thread-on, thread-off cycle and the corrosion that comes with life on the water far better than plastic inline units.
Do I need any tools to install it?
No. Hand-tighten the inlet onto the shore or dock spigot, connect your potable-water hose to the outlet, and open the tap. There's no wiring and nothing to calibrate out of the box since it comes preset.
Can I leave it connected when I winterize?
Since there's no built-in check valve, the body drains and blows out clean along with the rest of your freshwater lines. Still, pull it and store it somewhere it won't freeze solid so trapped water can't crack the fittings.
