When it comes to pumping water there is a vast amount of options available to choose from however you need to be certain of the requirements in your system otherwise you are likely to find that the particular pump you have is not fit for purpose.
When it comes to the HOTTAP Hot water system the ideal specifications for the pump are that it flows at least 6 litres per minute and no more than 12. You are also looking for a pressure level around 60 PSI. Meeting these operating ranges will ensure optimal operation from the HOTTAP system.
Main types of pumps you may come across are:
Centrifugal water pumps
These style of pumps generally consist of one or more impellers typically driven electrically. You will find Bilge pumps fall under this category. These style of pumps are not suitable for the HOTTAP due to their nature of providing high water flow rates but low water pressure. We have found from past experience that generally these will not have the required water pressure to activate the pressure switch in the HOTTAP.
Positive displacement pumps
PD pumps do not have impellers, instead they consist of either rotating or reciprocating parts and generate high pressure to push the water along the system. These style of pumps will generally provide lower flow rates than centrifugal style pumps however provide much higher water pressure. These style of pumps are ideal for the HOTTAP system and as long as the specifications are within 6-12 litres per minute and around 60 PSI it will be perfect for the HOTTAP system.
If you are in doubt and want to eliminate any unknowns you can grab the FLOTAP which is specifically engineered for the HOTTAP or if you pick up the HOTTAP Outing kit you will already have the FLOTAP included.