spa pump replacement

[mas985]

I was talking to a friend who has a full size pool. His only has a 1.5 hp pump. I am wondering why my tiny spa needs a bigger pump than a pool? I considered downsizing to a 1.5hp one but found a good price on a 2hhp so went ahead with that.

Spas jets require high flow rates and high pressure. Pools don't. In fact, a pool can usually get away with the smallest available pumps on the market. I use a 1/2 HP pump on my pool but my spa has a full rated 1 HP dedicated jet pump that does not go through the pad equipment which will lower flow rates.

But you just can't compare HP on pumps either. The label HP has only a loose relationship to power. You really need to compare pump head curves when choosing a replacement pump for a spa so I really hope you did that. Otherwise, you could end up with a pump that is either overpowered for the spa or under-powered.

What was the model # of your previous pump?

[sharpstick]

There are some barely legible numbers on the impeller end plate, "311-1110" and "E126519" (Pretty sure that's what they are.) No other info known. I think it was purchased about 8 or 10 years ago. I'll search my records and see if I can find anything else.