New Pentair Quad DE and multiport 261055 not lining up

judas

Active member
May 25, 2007
28
MA
Did some searching here and on the web and couldn't find anything regarding this situation I have:

Received my new Pentair Quad 80 DE filter today, along with the Pentair multiport # 261055. These were confirmed to be compatible.
When I dry fit these 2 pieces together, the MP's upper fitting sits flush with the filter's bulkhead. However the MP's lower fitting has a gap of approximately 1/4".
Is this normal fitment or is something else going on with either the filter or MP?
Pics for reference:
 

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JamesW

TFP Expert
Mar 2, 2011
27,611
This is the bottom fitting part number 178575, which is what seems to be stamped on the fitting.
pentair-4600-8575dims.jpg


This is the top fitting. Part number 194801.

Pentair-194801-dims.jpg



The top fitting is shorter to compensate for the difference.

Can you verify the part number for the top fitting?

 

JamesW

TFP Expert
Mar 2, 2011
27,611
Can you remove the valve and put a straight level vertically on both fitting faces at the same time to see if the level sits flush and vertical?
 

Candurin

Well-known member
Jun 30, 2017
300
South Jersey
Pool Size
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Not sure if this is helpful at all, but I snapped a picture of my filter connected to my MPV (it’s the hiflo version, but the connections appear to be the same).

8D366B76-E35C-4B50-A997-59A69C78EEE0.jpeg
 

skimmerswimmer

Well-known member
Jul 30, 2013
479
Long Island, NY
I have the Pentair DE60 and sometimes the ports don't always mate perfectly...had an o-ring issue one time that got partially squeezed between the two mating surfaces. I found with this multiport connection, sometimes you just have to jam it in after verifying there is nothing interfering and let the threading of the bushing do the compression work.
 

judas

Active member
May 25, 2007
28
MA
The bottom fitting is stamped 178575. Top is stamped 194801.
If I flip the multiport upside down it fits perfectly!
 

judas

Active member
May 25, 2007
28
MA
If I put a straight edge on both MP fittings, the top fitting sits inward about 1/8" compared to the lower fitting.
It's hard to tell in the pic because there isn't a lot of space to see, but this is the MP dry fit and unsecured (unscrewed).
 

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JamesW

TFP Expert
Mar 2, 2011
27,611
Definitely not cross threaded - that gap with the bottom fitting is the same when the MP is dry fit to the filter, without any of the nuts being tightened.
The top nut blocks the fitting from going in all the way until the nut is tightened.

It looks cross threaded.

I would try it again.
 

judas

Active member
May 25, 2007
28
MA
The top nut blocks the fitting from going in all the way until the nut is tightened.

It looks cross threaded.

I would try it again.
which pic are you referring to?

I don’t have a level long enough but I tried a couple different rulers, all with the same result:
 

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JamesW

TFP Expert
Mar 2, 2011
27,611
filter-1-jpg.330103


This looks cross-threaded.

Put some lube on the O-rings and in the filter fittings and make sure that there is noting blocking the fittings from being fully inserted and then insert the fittings and screw both nuts making sure that they are not cross-threaded.
 

JamesW

TFP Expert
Mar 2, 2011
27,611
It looks like the filter and multiport are both about 1/8" off, which combines to 1/4" off.

If you try to secure the nuts, does it feel like it takes too much force to get them fully tightened?

Maybe try tightening both at the same time.

Put some lube on the O-rings.

What happens if you tighten the bottom nut first?
 

judas

Active member
May 25, 2007
28
MA
It looks like the filter and multiport are both about 1/8" off, which combines to 1/4" off.

If you try to secure the nuts, does it feel like it takes too much force to get them fully tightened?

Maybe try tightening both at the same time.

Put some lube on the O-rings.

What happens if you tighten the bottom nut first?

The top nut tightens easily by hand, then when I try the bottom there is that gap which causes the lower fitting to not sit square against the bulkhead - can't tighten the the night.
If I flip the multiport upside down and install it, it fits perfectly. Nuts tighten by hand, everything is square.

Is there any adjustment with the filter's bottom bulkhead fitting? Can it be backed out enough to make up the difference? Or is that supposed to be threaded in all the way (to a positive stop)?
 

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