City Water...

[GregS]

I am jus curious why converters always or it seems always have the coach water supply supplied via the onboard fresh water tank and pump even when hooked to a city water source? So I always have to manage the avaliable water to the faucets by refilling the onboard water tank. All of the production motor homes I have owned bypass the onboard water tank and pump when connected to an external presurized water source...

[Mark3101]

I prefer it this way. You keep your tank filled with fresh water and don't have to worry about city water pressure either being to high or low.

[Jon Wehrenberg]

Greg,

The decision about using city water (and pressures) or to pump from your holding tank is usually based on how your converter designed the water system. A conventional motorhome may have been equipped with a single low flow water pump so in that case municipal water would be the preference. But I think the Prevost converters today want to have a water system that is capable of handling multiple uses without any degradation in water flow so they are being equipped with high volume, high flow pumps so someone taking a shower is unaffected by someone flushing a toilet.

Mark is correct about not worrying about water pressure and I think you will agree the variations in municiple water systems will make it just nicer to use your pump.

[truk4u]

Is this a Millenium thing? I have had a Marathon, CC, Liberty and now the Royale and they have all been plumbed to allow city water direct into the coach. All 4 have had fresh water fill, either automatic or manual to the fresh water tank for use with the pump when not hooked to city water.

[CAPT MOGUL & Sandy]

Truk, our 2001 Royale has the city water coming in via the tank. You are right though with the '97 Royale. It came straight in to the coach! So it isn't just a Millenium thing.
Sandy

[garyde]

The pressure using shore water doesnt come close, partly due topressure regulators on board and at campsites. I prefer to use the on board pump.

[BenC]

Greg,

The decision about using city water (and pressures) or to pump from your holding tank is usually based on how your converter designed the water system. A conventional motorhome may have been equipped with a single low flow water pump so in that case municipal water would be the preference. But I think the Prevost converters today want to have a water system that is capable of handling multiple uses without any degradation in water flow so they are being equipped with high volume, high flow pumps so someone taking a shower is unaffected by someone flushing a toilet.

Mark is correct about not worrying about water pressure and I think you will agree the variations in municiple water systems will make it just nicer to use your pump.

This is true, but largely dependent on the type of toilet being used as well. If it is a direct drop Sealand, Thetford, or Microphor Electric toilet, little water is used for flushing, so it doesn't really matter which approach to water system design is used, but it does matter if the toilet is a Royal Flush "Water jet pump" toilet. The Royal Flush toilet takes high velocity water to create the venturi vacuum in the volute of the bowl, and the "jet pump" principle of evacuating, macerating the toilet bowl contents, and pumping the contents to the waste tank. This toilet takes a full 1-inch water line plumbed from the pump outlet through the flush valve and directly to the toilet to accomplish the flushing. An accumulator tank can be placed at this juncture in the fresh water system so that the toilet can often times be flushed without the pump turned on as long as city water pressure was high enough, even if the flow rate was not there through the smaller diameter city water hose and the protection regulator and smaller fresh water piping lines, but this is still not a "sure thing" to flushing without the pump. The sad thing was, regardless of what the coach converters wanted to put in for a toilet, the Royal Flush became an "industry standard" at a point in the late 90's, and since then, all the big converters have utilized them.

[truk4u]

Ben,

My CC Magna that I had last year had a Headhunter toilet that was electric, no air, and worked off city water or pump. It worked pretty well with various water pressures. I don't recall the model or name, other than Headhunter, but seems like that would be a good alternative to air. I've had both versions of Microphor, air and electric and the air seems to work best. My preference over all of them is the Microphor air.

Jon has to have the Headhunter Extreme Duty, don't flush while seated, Mega Turd Slinger for obvious reasons! He has even attempted to improve performance by using an air doubler while poor Di waits outside with a close pin on her nose and ear protection.

[Jon Wehrenberg]

I believe Truk is in the early stages of dementia. He has me mixed up with JDUB and the Anaconda affair.