Pentair Sta-Rite Posi-Flo II Filter Base With Pipe Plugs - WC104-78P



Part # 9239-07

By Pentair Pool Products

  4.75 Average  



Part # 9239-07

Manufacturer Code WC104-78P

Alternate Part #'s 171021009, STA0513755, WC10478P, 17-102-1009, PENWC104-78P, STA-051-3755

Product Description



?     Asked on 4/25/2021by Arthur Lutz

I need to replace the base on my T-100 Sta-Rite Posi-Flo cartridge- T-100TXR. Is this the correct base to order?

A  Answered on 4/28/2021 by InyoPools Product Specialist Charlie R.

Arthur, Yes, this is the correct base and plug for your T-100TXR filter. 

?     Asked on 3/23/2020by Ed Goldberg

will this base Base With Pipe Plug (wc104-78p) fit a posi flow 2 model ptm100

A  Answered on 3/23/2020 by InyoPools Product Specialist Patrick P.

Hi Ed, Yes this is the proper replacement base for the Posi Flo II PTM100 filter.

?     Asked on 12/5/2017by Raymond

Does this come with the drain plug part Number WC78-38T. It looks like it on the picture

A  Answered on 12/6/2017 by InyoPools Product Specialist Lennox H.

Hi, Raymond. Yes, the Drain Plug - WC78-38T is included. 

?     Asked on 11/28/2017by Tucker

My Sta Rite filter is model number T-70TXR. It has 72 square feet of filter area with a maximum working pressure of 50psi. This base looks like the one I need, but want to make sure it fits the stainless filter canister. Also, do you carry the o-ring that goes on the base?

A  Answered on 11/28/2017 by InyoPools Product Specialist Hector F.

Yes, this is the correct base for that model filter, and the o ring for that base is part number 9239-04.

?     Asked on 10/11/2015by Inyo Visitor

Will this base work for my stainless steel cartridge filter Sta Rite 135 TX?

A  Answered on 10/13/2015 by InyoPools Product Specialist Lennox H.

Hi, The Base With Pipe Plug (WC104-78P) can be used with the Sta-Rite 135TX Stainless Steel Filter.

?     Asked on 9/16/2015by Chris

Does this base work with a 135TXR? Or perhaps, could you recommend a DE filter to completely replace this system? Pool ~20k gallons. If I'm going to spent $130 for this part, maybe worth more to just replace the entire system.

A  Answered on 9/17/2015 by InyoPools Product Specialist Hector F.

Yes this base will work with your model filter. In order to properly size a D.E. filter for your pool we would also need the model of the pump and motor, as well as the amount of feet of lines to and back from the pool. Please call in with those specifications or email us at our support request page and we can size accordingly.

?     Asked on 6/30/2015by Inyo Visitor

Is this the right base for Sta-Rite 70TX w/stainless canister?

A  Answered on 6/30/2015 by InyoPools Product Specialist Dennis R.

Yes, this is the correct base for the Sta-Rite Posi-Flo Stainless Cartridge model T-70TX

?     Asked on 6/5/2015by Joe

Will this base work on model # 50TX & If ordered on Monday how long to deliver Central texas? Thanks

A  Answered on 6/7/2015 by InyoPools Product Specialist Patrick P.

Hi Joe, This base does work on the Starite 50TX filter and if ordered on Monday it would be delivered to Central Texas on Thursday or Friday.


Est. Repair Time

Less than 1 hr

Tools Needed

Nut Drivers, Socket Set

Cracked housing

Written on 2/6/2017 by Guest

Took off the old one and installed the new one from inyopool and it fit like a glove. No more leaks and did not have to replace he whole filter housing . It was not available in pool supply store in our area !! Thanks Inyopool

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