As might be expected of a ship that floats on water, uses water, leaks water, sucks water and blows water, the on-board water systems are both complex and interesting. Pretty much all of the water is PUMPED into, around, and out of the ship one way or another apart from
1.RAIN pouring down on the decks, which may just pour out at the gunnels but more like will drip down into the cabins below and eventually end up in the bilges. The decks are well sloped from the peak back to the engine hatch and in the opposite direction from the stern, The good old wheelhouse looks after most of that end and is the driest place on board. The wettest place is the engine room, because of the slopes from stern and bow to this area. Because skipper, crew or guests rarely if ever spend time down here it gets a low priority among caulking parties
2.SEAWATER shipped on board in heavy weather, washing over the decks in F7 which may or may not act as 1. above. Seawater will usually enter about the mainmast and will run back most of the length of the boat. No big deal as nowadays we don't get crews able to deal with F7 and would usually stay in a safe haven from F5 up. The boat is somewhat delicate and should not be pushed too hard.
3. LEAKS in the hull of which there will always be some, often many, but none usually significant on its own except as a handy way of winding up a skipper on a dull day. Obvious sources, easy to find, are the Portside propshaft and the Portside hull behind the 'covers' in the Portside heads. Other parts that leak The whole deck over the engine room. Driest place on board is the wheelhouse. It never leaks. Its roof membrane was renewed in 2005 by Tony and Eric. The next driest place is the back end of the engine room aft of the mizzen mast and UNDER the said wheelhouse. The forepeak is pretty dry most of the time but is not to be fully trusted for sleeping purposes. Use tarps. if you want to certain to stay dry in the peak
WATER PUMPS: Do you know there are at least six water pumps in the engine room working at all times!
Each ENGINE has two water pumps. One is integrally part of the engine, circulating fresh water round the engine block and heat exchanger and (in the case of KJ) through the ship's hot water cylinder immersion heater which is simply another heat exchanger. The other pump is external, sitting on top of the engine and belt driven. It sucks seawater via a filter into the engine's heat exchanger and pumps it out to the exhaust pipe. Yes! You read that right!
While a boat's engine is running, there will be water (often steamy) spraying from the exhaust outlet. On start-up the first check to make is to ensure the water is exhausting. If there isn't, shut that engine down fast and investigate.
BILGE PUMPS: Any unpumped water which does not escape via the gunnels will find its way down to the bottom and centre of the boat into The Bilges, from which it may be pumped by automatic or manual pumps or even the diesel-engined fire-pump which lives in a locker on deck. Pump outflow points for bilge-pumps are found on the PORT side about two feet above the water line. There are three bilge pump outflows as follows.
1. For the 240VAC pump which controls the water level in the bilge under the main cabin while berthed. This pump can shift about 2500 litres per hour continuous. WORSE! It has been known to.
2. Alongside No.1 is a second outlet for the 24VDC pump which does a similar job as the mains pump.
3. Engine-room bilge outlet about 10' aft of 1&2, instantly recognisable most of the time as being somewhat oily (entirely as a result of poor house-keeping in the engine room let it be said). Engine room bilge has an emergency 'battery electric' pump, with special needs, known only to Engineers. It is an ingenious device using a 24VDC starter motor from a truck to drive a pump which sucks up from the engine bilge and blows the water out of its own outflow via a non-return valve.
Each 'head' has a pump which everybody on board should know how to use and which the Chain Gang must keep in working order. It is able to pump out excrement, wet paper and urine mixes, sometimes termed No.1s and No.2s. It is also able to pump in seawater to flush the bowls.
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KJ has three storage tanks for fresh water. The main tank is in the centre of the mess under the table. (Its maximum capacity is about 300 gallons) There are two auxiliary tanks, Port and Starboard in the forepeak under the lower bunks. The auxiliaries are supposed to be isolated at all times and maintained full JUST IN CASE. (They each hold 130 gallons). Fully watered the boat can go to sea with over 550 gallons (2.5 tons) of potable water. Filling the tanks is done through various access points on deck. This work is normally done by the Chain-Gang all of whom have been trained in the correct procedures. The procedure is tedious and somewhat complex and please note
Tighten the brass plate for the water supply with the PLASTIC key
which at all times hangs with the 'door' key on the gas bottle in use.
NEVER EVER tighten it with the tool used to secure the diesel tank access caps.