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🛠️ Keep your RV’s water pure and pressure perfect—no backflow, no worries!
The Camco RV Water Heater Backflow Preventer is a compact, heavy-duty brass valve with stainless spring construction that ensures one-way water flow to your RV’s water heater. Featuring standard ½-inch NPT male and female fittings, it effectively stops backflow to protect your freshwater system, making it an essential upgrade for any RV owner focused on water safety and system longevity.

| ASIN | B000EDUTN6 |
| Best Sellers Rank | #107,692 in Automotive ( See Top 100 in Automotive ) #250 in RV Freshwater Hoses & Fittings |
| Brand | Camco |
| Brand Name | Camco |
| Color | Brass |
| Connector Type | NPT |
| Customer Reviews | 4.6 out of 5 stars 1,389 Reviews |
| Exterior Finish | Brass |
| Global Trade Identification Number | 00014717233033 |
| Included Components | Back-Flow Preventer 1/2" (E/F/S) (CLAM) LLC |
| Item Dimensions | 5.5 x 3.63 x 2.25 inches |
| Item Type Name | Camco RV Water Heater Backflow Preventer |
| Item Weight | 4.48 ounces |
| Item dimensions L x W x H | 5.5 x 3.63 x 2.25 inches |
| Manufacturer | Camco |
| Manufacturer Part Number | 23303 |
| Manufacturer Warranty Description | Limited 1 Year |
| Material | Blend |
| Material Type | Blend |
| Model Number | 23303 |
| Number of Packs | 1 |
| Number of Pieces | 1 |
| Size | 1 Count (Pack of 1) |
| Thread Size | 0.5 inch |
| Thread Type | NPT |
| UPC | 014717233033 |
| Unit Count | 1 Count |
C**Y
I feel good about getting brass over plastic.
Feels like it’s very solid construction. Easy to install. Used Teflon tape on the installation and have some very slight leakage. I mean very slight. I’m going to get some pipe dope and reassemble and see if that stops it completely from dripping. Happy I went with brass to replace the plastic one that failed.
J**D
Nice
Works
T**Y
Delivered on time installed works correctly
Works like it should probably gonna get another set.Soon rebuilding my trailer as my trailer decided to drop a part of the roof on my dining table
J**C
Threads are very tight and rough. Should have been factory burnished.
Be aware the thread quality on these is very tight and rough and should have been burnished by the factory. When screwing into our ABS trailer water pump, the starter threads on these are so tight that it has a tendency to cross thread. I had to file and burnish the first few threads so it would properly receive the female threads to the water pump. Other than that, it works very well to keep water from backflowing into the trailer tank when using a city water hose hookup.
I**R
Fix your backfill problem
Pump backfilled the fresh water tank. Thought I needed a new pump, but this was a much cheaper fix. 10/10 would recommend if you have this problem.
C**N
Extra protection to avoid an overflowing fresh water tank
The fresh water tank on our 2016 Minnie Winnie started dripping from the overflow. When connected to a "city water" connection, it was also filling our fresh tank through a leaking check valve. The Shurflo 4008 bypass pump has a check valve built in it. It's an easy repair with Shurflo #94-800-03 check valve repair kit, but I wanted to go a step further so I added the Camco 23303 valve. To make certain it wasn't too restrictive I did a simple volume comparison using the garage laundry sink and a cheap cut of garden hose. With the same water pressure it took 1 second longer to fill a gallon jug with the valve inserted in the garden hose. For the installation the factory hose was cut on the discharge side of the pump, and with a couple of PEX fittings, as well as crimping collars and tool, it was fairly straight forward. The brass valve has a flow direction arrow etched into it (enhanced with a Sharpie for the photo). Shurflo advised the valve could go on either the intake or discharge side of the pump, but also agreed that these pumps generally push better than they pull, thus the valve went on the outlet/discharge side.
R**L
RV pump
These work great for installing before the pump in a RV when the one in the pump fails & fills your fresh water tank.
D**A
Fine
Fine
B**N
solid construction, well made. Doesnt feel cheap.
used in a solar water heater array. Well made, good price and so far its been working. As always I will update if the product fails or I have issues.
N**A
Excelente para evitar el retorno del agua caliente en la reguladora de temperatura
Excelente material y funcionamiento
G**S
Producto recomendado.
Corresponde al articulo publicado, material y acabados de buena calidad, funcionamiento optimo, facil instalación.
T**S
Perfect Fit and Priced Right
Worked perfectly to fix my hot water issue in my RV trailer. The old one was totally blocking any water flow. Nice sold brass threaded connections.
M**S
check valve
works good but changed to different method
Trustpilot
1 week ago
3 weeks ago