Facebook comments:

2 Responses to Whale 12 Volt In Line Pumps

1. darren says:

   November 26, 2009 at 5:34 am

   Hi

   I need a pump that will replicate ‘mains pressure’.

   We have a dog washing hydrobath that we are installing in a van for mobile dog washing. The bath has a tank that contains a heating element. The tank also has a ball cock valve. Where this type of bath is installed in a building, a hose is attached to the bath inlet. As the water level goes down the ball cock valve opens the the inlet and mains pressure water enters via the hose, which maintains heated water.

   I want to replicate this in the van. I need to install a header or feeder tank to supply water to the bath tank as it empties. The header tank will be 210 – 250 litres (i had hoped to get away with 125litres but I have since been told that tanks are not sold with baffles do not come below 210 litres.) The bath will be fitted above the rear axle, so if I tried to put the header tank in as a gravity fed system it would be above 20CM and behind the rear axle. I would prefer to be able to install the tank somewhere else and either at floor level or below. (however it may still have to go behind the rear axle.) Therefore I need a pump that will present the bath tank inlet with mains pressure so when the bath tank inlet opens, water is pushed into the bath tank. I presume that the pump would sense a change in pressure? It would need to protect itself if it runs dry or takes on air. I havent considered fitting a water level gauge but if this is easy and fairly cheap, i would consider it.

   Many thanks

   Darren
2. admin says:

   November 26, 2009 at 6:01 am

   Most domestic water companies aim to provide pressure of around 1 bar and flow rate of around 9 litres per minute in the pipe connecting the mains water to your house. One bar is the force needed to raise water to a height of 10 metres, so you’re looking at a low power pump capable of producing that kind of pressure, or a flow rate of around 2 or 3 gallons per minute.