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FAQ's

With our frequently asked questions section below we have compiled the most common pumping questions we are asked about Salamander pumps, to see the answer just click on the question.

If there is a question that you need answering then please email us or call us and we will en devour to answer the question

 

Q - What is a positive head pump?
A - A positive head pump is a pump that uses a flow switch to activate the pump, this will vary with different models but as a rule of thumb with domestic pumps 1 liter of water flowing will turn the pump on.
 
Q - What is a negative head pump?
A - A negative head pump is a pump that uses a drop in pressure to active the pump turning on, for example when you turn on the electrical supply for the first time the pump will run, it will run until the pressure reaches the set amount say 1.0bar, at this point it will switch off, then when water is drawn off of the outlet the pressure will drop between the outlet and the pump and the pump will then activate and stay on untill the water can reach the desired pressure.
 
Q - How do I know if I am storing enough cold water?
A - It will depend on the usage of the devices on your system and what type of hot water storage cylinder you have. If you are using high flow rate devices such as large shower heads then you will need to store more hot water to compensate for the usage, some showers can use up to 30 liters per minute the average is about 14 liters per min. with baths the manufacturer will normally state the usable volume.
 
Q - How do I know how much hot water to store?
A - It will depend on the usage of the devices on your system and what type of hot water storage cylinder you have. If you are using high flow rate devices such as large shower heads then you will need to store more hot water to compensate for the usage, some showers can use up to 30 liters per minute the average is about 14 liters per min. with baths the manufacturer will normally state the usable volume.
 
Q - What electrical power supply will I need for a pump?
A - Pumps are low amperage generally no more than a 5amp supply is required, there is normally a 32 amp ring main nearby if you situate your product in the cylinder cupboard, there you should either use a single 3 pin socket outlet or a single switched fused spur outlet.
 
Q - How much water will the pump use?
A - This will depend on the type of outlet you are pumping to, the larger the outlet bore the higher the flow rate up to the maximum of the size of the pump used.
 
Q - Are there quiet pumps?
A - All pumps will generate noise but the volume a pump creates will depend on where the pump is fitted, what type of pump is chosen and how much pressure the pump generates. The general rule of thumb is that a regenerative pump is louder than a centrifugal pump, install the pump in the recommended position and size the pump correctly for the requirements.
 
Q - Can I pump mains water?
A - You cannot pump mains water directly, you can use what is called a break tank system where mains water is stored in a cold water tank then pump the water out of the tank recreating mains water pressure. Click here for more information
 
Q - What is an equilibrium ball valve?
A - An Equilibrium ball valve is the type of ball valve that has a full flow of water until the level gets to the desired height in the WC cistern then it will shut off the flow, with standard valves the water flow gets slower as the the arm raises.
 
Q - Can I fit my pump under a bath?
A - Yes you can fit a pump under a bath as long as it is close to the source of the hot water cylinder no more than 3 meters. It is not a recommended place to fit the pump as is tends to be noisier fitted there and there is not a lot of space for plumbing pipe work so avoid it if you can.
 
Q - What should the pipe size to my pump be?
A - The supply pipe size is determined by the connection size on the pump if you have 22mm pump couplers then use 22mm pipe and teh same will apply for 15mm couplers.A point to note is theat especially on the supply (suction end) of the pump it is important not to restrict the flow,always fit full bore valves to isolate a pump.
 
Q - Can I use one pump for two showers?
A - Yes you can use one pump for two showers as long as it is sized correctly for the job. If you are have a large shower head then you will need more flow therefor a larger pump will be required, using one pump to pump to two showers will give you a reduction in pressure when both showers used together but if you size the pump correctly then you should have sufficient flow still.