|Courtesy Camping World|
Some toilet models allow the addition of an after-market spray nozzle kit. Do you flush a Dometic? There's an after-market kit for that. It includes a spray nozzle, a clip to hang the nozzle on, and installation kit that includes a vacuum breaker. The purpose of the latter device is to prevent any liquids from the spray nozzle assembly from making their way backwards an back into the RV water supply system. Camping World will sell you one for a little over $60, but by being smart and shopping around, you can beat this price.
Keep in mind, in addition to the issue of these critters being a bit on the pricey side, some RVers have complained that because the thing is plumbed through the toilet supply line, there can be a bit of a loss off pressure, making your cleaning efforts a bit more difficult.
There are alternative approaches to this matter. Some RVers report (and we personally have experienced) that their shower head will reach out from the shower stall and down to the throne with ease. They just use the shower head to blast away at any undesirable bowl dwellers. OK, this is a really cheap solution, but unless you can hang onto the shower head while holding it over the bowl, then stretch and reach the shower control valves to turn on the pressure, you're apt to get a few drips on the floor. You pays your money . . .
Other alternatives? Sure enough. Put a plumbing T in the water line that serves your toilet. Incoming water flows into the T, then one side out to the toilet, and the other to a hose line leading to: 1) A shower head (with appropriate shut off valve) 2) A toilet bowl rinse head, or 3) a garden spray nozzle. The latter seemed like overkill to us, but hey, it does develop quite a stream.
But what about a vacuum breaker? If you're clumsy and apt to drop your new toilet bowl blaster in the pot and leave it there, yeah, you might want to add the vacuum breaker. Otherwise, it would seem pretty unlikely that icky stuff could make its way back into your fresh water system.