After 30 years of modification the water systems on Maringret needed review and selective replacement.

The HR 41 was one of the first production boats to be built with pressurised water (hot & cold). Previous owners had made various alterations, some of which we wished to remove. in addition the plastic hose was 30 years old and getting very brittle in places.

Various steps were undertaken to produce a water system that was robust and dependable.

Electric Toilet

The manual toilet in the aft head had been removed and replaced with an electric toilet by previous owners. In addition to consuming electricity electric toilets must be flushed with fresh water so it was plumbed into the fresh water tank. One of the first things we did upon buying Maringret was to disconnect the electric toilet and shortly afterwards it went onto eBay and ended up on a canal boat. The electrical circuit and fresh water line were both removed and there is now no trace of it.

Replaced Hot Water Heater

The original factory installed water heater was in Maringret when we bought her. That water heater only worked from the engine cooling circuit and had no facility to run off of AC. We replaced the original water heater with an IsoTemp 40 litre water heater which is operable from both shore power (or the inverter when we have enough power coming in from the wind generator) and the engine cooling system.

Replace Sinks and Taps

The double sink in the galley when we bought Maringret had 2 basins of equal size – actually it was 2 single basins that were mounted beside each other. Unfortunately neither of the basins was wide enough for a standard dinner plate to be placed flat on the bottom. The double sink we ordered is a single fabrication with 2 basins of unequal size, the larger being more than large enough for a dinner plate to be placed flat on its bottom.


We ordered a new mixer tap for the pressurised water system as well as 2 single taps for the foot pumps.

Install Foot Pumps

The factory had fitted a small foot pump for fresh water but that had been taken out by previous owners. We fitted Whale Gusher foot operated pumps at the bottom of the cabinet under the sink – one each for fresh and salt water. These both went to a Whale straight tap over the main basin of the sink.



With water lines running for hot and cold water, salt water, engine cooling water and bilge pumps the area around the sump at the front of the engine room was a spaghetti pile, all lines other than the engine cooling water were the same hose. Not only we didn’t know which hose was carrying which function but we had no way to drain and shut off portions of the system. Newer boats (and also top end camper vans and mobile homes) have water manifolds plumbed in so different water circuits can be turned off (say for winter draining or for maintenance). We decided to do the same for Maringret. As we move from season to season and climate to climate we often don’t use some of the water circuits for months at a time. We had never liked the idea of water sitting in the hoses for that period, whether it is fresh or salt, if there is any daylight falling on it then there will be growth in the hose.

We initially thought it would be easy to find some sort of device, we did find manifolds but not ones where each circuit had its own flow control. Finally we had one made up from XXX fittings. We had 2 made up, one for hot water and one for cold, each with one inflow and 4 outflows.

Cold Water Hot Water
1 forward head forward head
2 galley galley
3 deck shower (presently not connected) deck shower (presently not connected)
4 aft head (presently not connected) aft head (presently not connected)

To aid in identifying hoses we used red and blue hose for the two pressurised lines and clear for the rest. That way we can tell if a line is pressurised by looking at it.

Maringret now has a “water control” panel. In winter we can shut and drain out the line for the deck shower, should we want to shut off the pressurised water we can do so at the inflow to each manifold. The manifolds are separate and so the two water supplies can be shut off independently. The sea water comes from one seacock and can be shut off there.

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