FNS® Plus 36 DE Filter - EC-180007



Model # EC-180007

By Pentair Pool Products

  5 Average  



Model # EC-180007

Warranty Ecommerce (EC) products: Products purchased from an Authorized Pentair Online Reseller (products beginning with EC-) receive a one (1) year (parts only) warranty from the date of purchase. The exceptions are: IntelliChlor cells and IntelliFlo SVRS pumps which receive a two (2) year warranty. EC products are not eligible for the bundled three (3) year extended warranty.

Alternate Part #'s 180007, EC180007, PAC-05-0083, PENEC180007

Product Description

Inyo Recommended Filters

Pentair FNS Plus filters are fiberglass reinforced polypropylene of advanced chemical resistant materials for superior strength and reliability. The top manifold design features the Service-Ease grid pack for convenient one-at-a-time grid servicing. Pentiar Backwash valves are sold separately.

  • Superior strength
  • Service-Ease grid pack
  • Continuous High Flow internal air relief*
  • 100% factory tested
  • Top-to-bottom backwash
  • High Flow manual air relief valve
  • Tension Control clamp
  • Black valves and plumbing
  • 1 1/2 in. bottom clean out port
  • 7 1/2 in. centerline bulkhead fittings
  • Warranty 3 Yrs. Shell, 1 Yrs. Parts

Click here for more Pentair Filter

Product Specifications

Multiport Valve:
25 lbs.
Filtration Area:
36 sq. ft.
Flow Rating:
72 GPM
Turnover 8 Hrs.:
34560 gal.
Turnover 10 Hrs.:
43200 gal.
Turnover 12 Hrs.:
51840 gal.
DE Required:
3.6 lbs.

?     Asked on 9/7/2022by JOSEPH NIERER

I have this model Pentair and my question is how much DE should I add when I open my pool in the springtime?

A  Answered on 9/8/2022 by InyoPools Product Specialist Craig C.

Hello Joseph.  Attached please find the FNS® Plus Vertical Grid D.E. Filter Owner's Manual.  Please reference page 5, Table 2.  The Pentair FNS Plus 36 DE Filter requires 3.6 lbs. of Diatomaceous Earth to properly precoat the filter grids.  The filter grids should be thoroughly cleaned (manually or backwash procedure) prior to adding the 3.6 lbs of DE.

?     Asked on 9/30/2021by Mark Rosenthal

Have an Nautilus FNS 48 about 12 years old. Has started leaking at seal. Gasket replaced still leaking. Pool is 14 x 28 by $.5 deep. Can this filter be replaced with a 36 Pump is 1 HP

A  Answered on 9/30/2021 by InyoPools Product Specialist Craig C.

Hello Mark.  The Pentair Pool Products FNS Plus 36 DE Filter is compatible with a 14 X 28 X 4.5 ft (13,200-gallon) pool and a 1.0 HP pool pump.   The current backwash valve should align with the intake/discharge ports of the new FNS 36.  

?     Asked on 7/22/2021by Patric M Zwolenski

Do you have the Pentair 36 Filter #180007 and Pentair Multiport Valve #261177? What is the cost and when can i get it?

A  Answered on 7/22/2021 by InyoPools Product Specialist Craig C.

Hello Patric.  The Pentair FNS Plus 36 sq ft DE Filter part number 180007 and the Pentair Multiport Valve part number 261177 are both available as of this communication.  FNS® Plus 36 DE Filter - EC180007   1.5" Threaded Multiport Valve for D.E Filters - 261177     Attached please find a copy of INYO's Shipping Policy which will detail delivery options. Shipping Policy    Total order and per item cost information is available at checkout.  The attachments for the FNS Plus filter and Threaded Multiport Valve contain the product description and per-item cost.

?     Asked on 5/6/2021by Roger Hull

Have older Pentair 36 filter I want to purchase your EC 180007 FNS Pus DE filter Not sure If it will mount up to my multi port valves or not My existing connections from the slab are 1 inch higher than the new Pentair I do not know how to check if they would marry up to new filter or how to measure them

A  Answered on 5/6/2021 by InyoPools Product Specialist Patrick P.

Could you send us a few photos of your filter to include a photo of your filter label which shows your model #? To supply photos simply click the reply link below and upload your photos. Once we get those photos we can make the proper recommendation.

  • Commented on 5/7/2021 by Product Owner

    Here are -photos of my old filter. I need to know what size my valve connections are 2” I think. I am wanting to order a new ec180007 if it will match up if I raise it one inch since the existing valve fittings are 1” higher. Sorry labels have been gone for years.

    • Commented on 5/7/2021 by InyoPools Product Specialist Patrick P.

      Hi Roger, Unfortunately the photos did not come across, however the old valve on your filter should fit this Pentair FNS Plus filter. Do you have any model information of the valve like valve manufacturer or part #?

?     Asked on 7/25/2020by Paul

What HP pool pump Size is compatible with a pentair FNS 36 de Filter? Thanks!

A  Answered on 10/27/2020 by InyoPools Product Specialist Hector F.

Hi Paul, here is a guide that we put together called "How to Size a Pool Pump for Your In-Ground Pool" that should assist. 

?     Asked on 6/15/2020by ROBERT ROSSI

I Have a DE 3600 hayward from 1987 it has work great. All I have done is rebuild the element every few years. now the the tank is cracked and leaking around the flange. I would like to replace the filter with a new one BUT would like to have the replacement filter with the valve spacing that old one has. just last year I put all new valves on it

A  Answered on 6/15/2020 by InyoPools Product Specialist Patrick P.

Hi Robert, You can go with this Hayward W3DE3620 DE Filter and the valve from your DE3600 will work on this new W3DE3620 Filter

?     Asked on 4/17/2020by Constance McCalester

I need a 1 1/2" side mount multiport for the DE filter, FNSP 36. Was told it had 6 screws. What do you recommend

A  Answered on 4/17/2020 by InyoPools Product Specialist Patrick P.

Hi Constance, You will require this 261177 1.5" Valve for FNS Plus Filters

?     Asked on 3/30/2020by John

What push pull valve fit this filter

A  Answered on 3/30/2020 by InyoPools Product Specialist Lennox H.

Hi, John. The Push Pull Valve 2"  - 263064 is compatible with this FNS Plus D.E. Filter. 

?     Asked on 5/29/2019by Inyo Visitor

pentair de filter 180007. what are the distances of the connections from the ground up?. There is the lower connection and the upper connection. Cannot find any specs on these measurements. thank you Tina

A  Answered on 10/15/2019 by InyoPools Product Specialist Steve M.

There is a 7-1/2" centerline between the bulkhead fittings on the Pentair Pool Products FNS Plus 36 Sq Ft Filter w/o Valve.

?     Asked on 10/29/2017by Tony

Is filter able to be used with the Pentair Intelliflo 3HP pump 011018?

A  Answered on 10/30/2017 by InyoPools Product Specialist Lennox H.

Hi, Tony. Yes, this filter can be used with the Intelliflo pump as long as the flow rate of the pump does not exceed 72 GPM. 

?     Asked on 7/17/2017by lucy schneider

Hi, I have ordered this filter, In the process of being shipped. Do you know how much the total unit weighs? I know the grid assembly weighs 23.5 lbs.

A  Answered on 7/20/2017 by InyoPools Product Specialist Stacey M.

Hello Lucy, the whole filter weighs 140 LBS.

?     Asked on 12/4/2016by Barney McLaughlin

My pool system is 30 years old. I have a Pac Fab DE filter model WS/FNS-48. The fiberglass is badly deteriorated and I wish to replace this filter with a new filter. Can you advise me of a replacement filter? Thank you

A  Answered on 12/5/2016 by InyoPools Product Specialist Adam Y.

Good morning Barney, You are looking for FNS Plus 48 Sq Ft Filter w/o Valve - 180008. I would also recommend you replace the muti-port. Which you can click on parts by filter and choose whether you have 1.5 inch or 2" plumbing.

?     Asked on 9/22/2016by Huynh Vo


A  Answered on 9/23/2016 by InyoPools Product Specialist Alan M.

Hello, how may we assist you?

?     Asked on 6/4/2016by Nick

I have in ground 16X32 pool( about 22000 gallons) with 300 lb sand filter and 1.5 hp pump , I need to change it to DE filter.what is the right size DE filter should I use and the right pump hp also the right valve. Thanks

A  Answered on 6/9/2016 by InyoPools Product Specialist Lennox H.

Hi Nick, The FNS Plus 36 filter can be a suitable replacement if your pump does not exceed 72 gpm. There are different types of valve that can be used with this filter depending on your pipe size and style valve. You can view the available valve via the Pentair FNS Plus D.E. Filter Parts page.

?     Asked on 10/2/2015by carol

I have a purex triton FNSP36 now i have to replace is this the filter that will fit what i have,

A  Answered on 10/7/2015 by InyoPools Product Specialist Lennox H.

Hi Carol, The Pentair FNS Plus 36 Sq Ft Filter w/o Valve would be the correct replacement filter.

?     Asked on 5/20/2015by Inyo Visitor

Will this filter a 20'x40' pool 33,000 gal?

A  Answered on 5/21/2015 by InyoPools Product Specialist Patrick P.

This filter can handle up 72 GPM's per minute meaning that it will be able to accomodate 34,000 gallons in an 8 hour time period. So this filter can handle your 33,000 gallon pool, however if your pocket book can handle it I would suggest going up to the FNS Plus 48 Sq. Ft. DE Filter. A larger filter will put less strain on your pump and will have a larger filtering capacity meaning you will not have to backwash your filter as often as with the 36 Sq. Ft. model.


Est. Repair Time

Less than 1 hr

Tools Needed

large channel locks and pipe dope.

Old on died.

Written on 9/22/2020 by Guest

Works like a champ. I hope it lasts 20 yrs.

Were these instructions helpful? 


Review Summary

 (Average 5  out of 5 stars)
2 Rating
5 star:
4 star:
3 star:
2 star:
1 star:

The Most Helpful Review

The Most Recent Reviews