How to Fix RV Toilet Water Pressure

Introduction

If your RV toilet sprays water outside the bowl when flushing, the water pressure may be too high. Installing a water pressure regulator will reduce the toilet’s pressure without lowering water pressure to the rest of your RV.

This repair is straightforward and doesn’t require special skills, but you will need to know how to turn off the RV’s water supply before starting. Some regulators include a wrench and hex key, so check before buying extra tools. Refer to your RV manual for details about your specific system.

What you need

Step 1 How to Fix RV Toilet Water Pressure

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Wrap the thread tape around the 1/2" nipple, 2-3 times in a counter-clockwise motion.
Make sure the nipple is fully covered, but the ends are open.

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Step 2

Screw the nipple onto the regulator, making sure the arrow (marked by the red circle) is pointing away from the nipple.
Be sure to screw the nipple in as tight as you can with just your fingers.

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Step 3

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Wrap the thread tape around the pressure gauge 2-3 times, in a counter-clockwise motion.
Make sure the thread is fully covered, but the end is open.
Do not thread the gauge in yet. Instead, note the angled slot where it will be installed in step 10.

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Step 4

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Turn the external water source (outside faucet) off.

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Step 5

Turn on the sink faucet and let it run until no more water comes out to drain the lines.
Flush the toilet to drain any remaining water in the lines.

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Step 6

Unscrew the water inlet line from the toilet.
Lay a towel down as some water may drip out.

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Step 7

Screw the regulator onto the back of the toilet where the water line was screwed in.
The arrow should point to the back of the toilet.

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Step 8

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Screw the water inlet line onto the nipple attached to the regulator.
This may be difficult, but be sure NOT to cross-thread.
Make sure to screw it in tight (finger tight), but do not over tighten.

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Step 9

Screw the pressure gauge onto the regulator.
Tighten it all the way down as far as you can with finger strength.

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Step 10

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Turn the water back on.

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Step 11

Check to make sure nothing is leaking.
If one of the fittings is leaking you may need to remove it and put more tape on the nipple.

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Step 12

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Remove the cap from the top of the regulator.

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Step 13

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Take the Allen Key and insert it in the top of the regulator.
Twist the Allen Key while running water into the toilet until the desired water pressure is achieved.

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