Backup sump pump

[Dannyboy5656]

I recently had a backup water powered sump pump installed. My plumber only used one check valve (see picture). Looking for advice/help to see if this is done right. From what I’ve seen online, there should be two check valves.

 

[Geofd]

Check your model # there is a PDF, shows a picture of it with a (foot) valve at the base of the pump discharge line if you search foot valve it's a one way valve so that's your (check)
Valve

 

[Dannyboy5656]

Check your model # there is a PDF, shows a picture of it with a (foot) valve at the base of the pump discharge line if you search foot valve it's a one way valve so that's your (check)
Valve

there’s a foot valve on the water pump... not on the main submersible pump

 

[Geofd]

I recently had a backup water powered sump pump installed. My plumber only used one check valve (see picture). Looking for advice/help to see if this is done right. From what I’ve seen online, there should be two check valves.View attachment 29825

Is there room to move the compression check valve just below the wye???? Then, install a union / ball valve were the compression check was

.

 

[Twowaxhack]

How to you guys interpret that ?

 

[Geofd]

View attachment 29830

How to you guys interpret that ?

Probably two separate lines, two separate main drain tie ins