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Some replacement taps – like my lever-operated mixer tap from Whale – are supplied with pre-connected cables that are ready to couple-up with a caravan’s wiring. However, you are not obliged to use these because this type of tap can also be operated in conjunction with a pressure switch that has been installed in the supply pipes. Alternatively,a pressure-sensitive switch is often installed within the casing of a diaphragm pump. Tip:Flexible supply cable should be 2.5 sq mm in cross-sectional area (21.5 A). It typically has 36 strands. Don’t replace — repair Tip:For more in-depth information, more than 70 illustrations, plus detailed advice on water systems are given in The Caravan Manual, Fourth Edition, Haynes Publishing. Routine servicing is a ‘must’
The macerator pump can be placed directly behind the toilet and can therefore operate independently of existing pipes and drainage connections. Ideal for moving waste water to a higher point. Sewage pumping station Tip:Surge dampers are usually fitted vertically, with the connection at the bottom. Two types of switches Tip:An electrician might temporarily link the two cables – which is what the switch does – just to confirm the pump motor responds. Detecting a changeCentrifugal pumps are largely the same as self-priming pumps, although they either have very light self-priming features or none at all. Given that centrifugal pumps have less suction power, they must always be manually started. Therefore, these pumps are often used for smaller suction heights, or systems where the water is already fed to the pump or closed systems (circulation pumps). Tip:Since a pressure drop from a poor pipe coupling can cause a pump to ‘blip’ briefly, many owners switch off the pump at night. Battery has an impact To avoid damage, most models have an interceptor or strainer fitted to the intake side of a diaphragm pump. A Shurflo pump has a clear casing so you can see whether any grit has been intercepted. Some are madein solid plastic but either way, inspecting and cleaning the filter is an important part of routine pump maintenance. Practical owners can undertake this – if the pump iseasy to reach. Regenerative pumps simply act like a powered water mill grabbing the water and spinning the water around and throwing it out the other side of the impellor, the benefits of a regenerative pump is that they are easier to install and are pretty tough.
In one caravan no cables came down from any of the taps, so the pump was obviously activated by a pressure-sensitive switch instead. These come in various types and when there’s a pressure drop in the pipes – such as when a tap is opened – the device detects this and power then flows throughto the pump. A Whale pressure switch is in the push-fit semi-rigid pipe near a surge damper, which is fitted ina 2013 Lunar Clubman SI. Many of today’s UK caravans are served by a submersible pump that you lower into the supply vessel. These have an impeller, which is like a paddle wheel and its function is to push water along the inlet pipe. This type of pump only delivers water when it has been ‘primed’ full of water. If they fail, repairs are seldom possible. Since replacements may not be available abroad, always carry a spare on tour.Pumps are designed to boost the water pressure to devices such as taps and showers where the gravity pressure is not sufficient to give a satisfactory flow to single outlet taps and mixers. Unfortunately, pressure switches react differently when the leisure battery’s state of charge is altered. A surge or a fall in a battery’s voltage level can cause irregular pump action. That’s why Whale’s in-line device has a ‘fine adjustment’ control wheel on top. Some diaphragm pumps that incorporate a pressure switch also include a sensitivity adjustment control, which is turned with a screwdriver.
A central heating pump provides heating systems with (hot) water. Did you know that a standard central heating pump is responsible for 10% of your energy costs? Start saving up to 70% with our central heating pumps! Macerator pump Centrifugal impeller pumps create a vortex of water with the pressure increasing towards the outside of the impellor, they are harder to install and instructions should be read carefully, the benefits of a centrifugal pump are a greater volume of water at the same pressure as a regenerative pump and quieter in operation.
Water pressure pump
Sometimes it is necessary that a taps or a mixer tap is in need of a boost in pressure for this you would normally use a single impeller booster pump. Single impeller pumps are designed to pump either hot or cold water to a shower or outlet like a tap.
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