Had my pool opened the other day. I have a Hayward sand filter. The guy had the multi port on recirculate before changing it to filter. He called me over and showed me how, when on recirculate, the pressure gauge was jumping back and forth between 24 and 28 psi. When he then switched it to filter the gauge just went to 29 psi and was not jumping anymore. He said that there should be very little or no pressure on the gauge when in recirculate which makes sense to me since it is not going through the sand. Anyway, I've always had higher than normal pressure according to several pool techs who have told me that on various occasions. The lowest it usually is is about 28 and will go up to about 38 psi and then that is when I backwash which sends it back down to 28 psi.
The tech told me that there was something wrong with the multi port and that it could be fixed fairly inexpensively. My question then is should there be pressure on the gauge when in recirculate position and could something wrong with the multi port switch be causing the high pressure I have? It is my understanding that normal pressure on the gauge of a sand filter should be around 10 psi for a low after back washing. Thanks.
The tech told me that there was something wrong with the multi port and that it could be fixed fairly inexpensively. My question then is should there be pressure on the gauge when in recirculate position and could something wrong with the multi port switch be causing the high pressure I have? It is my understanding that normal pressure on the gauge of a sand filter should be around 10 psi for a low after back washing. Thanks.