Yes that's possible. The pump will just have to run less to filter the entire volume of the pool. But please make sure that the hose connections match because Intex has 2 different hose sizes:


Filter pump model 604GS / 638GS uses 32mm hoses (item no .: 10116), and model 636GS uses 38mm hoses (item no .: 10493).


You need 2 B adapters when you want to upgrade to a pump with a 38mm connection. You can find this adapter under item no. 10722.