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ragtime

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Posts: 114
(5/24/07 9:49 am)
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Fresh Water flush
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Addison,

Here is a note from the Raritan Heads FAQ. Perhaps it will help.

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A9 How can I convert my Crown Head to pressurized fresh water flush?

A. 1) Remove hose at rear of head, going from intake pump to bowl elbow. Open intake pump and remove pump impeller. Replace pump cover.

2) Purchase a nominal 1/2" electrically operated solenoid valve (Raritan part #CWPS or equivalent) in the same operating voltage as the Crown Head. Mount the solenoid valve to the bowl elbow, using two short plastic pipe nipples, a short length of 3/4" hose and hose clamps. Connect the two wires from the solenoid valve to the two electrical motor lugs on the Crown Head, so that valve opens when head runs and closes when head stops.

3). Purchase a nominal 1/2" vacuum break (anti-siphon valve), WATTS #288A or equivalent. Loop the pressure water supply line at least 12" higher than the top of the toilet bowl and install the vacuum break at the top of this loop, using plastic pipe nipples and hose clamps. The direction of flow arrows should point toward the head.

4) Purchase a nominal 1/2" shutoff valve, either globe valve or ball valve and install in the water supply line between the water source and the vacuum break, using plastic nipples and hose clamps. This will allow you to regulate the water flow into the bowl, and also to shut off the water for servicing, etc.

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On my boat the fresh water for the head flush in the forward head is taken from a tee in the cold water line to the forward head sink. The line passes under the cabin sole to the port side of the boat under the pullman berth. It then passes throught the bulkhead and enters the cabinet behind the head. The siphon-break is located in that cabinet. The line then passes through the bottom of the cabinet to the back of the head.

In reality it is a bit more complicated because I have a LectraSan system and Raritan electric heads. I also have it set up so that I can switch between seawater flush or freshwater flush, so there are additional check valves and another pump in the system.

Gerry
C42 Ragtime #108