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xjuslipjaditbshr t1_jdjek8o wrote

Probably best to try to isolate the problem. Can you for example test the motor independently by disconnecting it from the piping and and see if it has enough suction?

If the motor is good, then you know it’s the pipes. And if the pipes are old and crumbling, you probably need to replace them.

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yaaa4 OP t1_jdm0yhx wrote

The motor is ok. While disconnected it's sucks! Replacing pipe is a big job.. the house has been modified since the installation (the house is 60 years old). I'll probably buy a vacuum canister before replacing all the pipes...

1