3/4" Check Flange Set Zoom

3/4" Check Flange Set


Brand: Wilo

Qty Price
/ each
$199.50 / box (10 units x $19.95)
In Stock! Ships in 24-48 Hours
(32 Available)


Material: Cast Iron
Type: Check Flange
Connection Type: Threaded
Connection Size: 3/4"
Accessory For: Star Series Pumps
Stratos ECO 16 RFC

Description for Wilo 2705085

3/4" Check Flange Set includes:

  • (1) 3/4" NPT flange with in-line check valve
  • (1) 3/4" Std. flange
  • (4) Nuts
  • (4) Bolts
  • (2) Gaskets

Fits ECO, Star F and FX models (excluding Star 17FX)

3/4" Check Flange Set


by PowerReviews
Wilo1" Check Flange Set

(based on 5 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars




of respondents would recommend this to a friend.

Reviewed by 5 customers

Displaying reviews 1-5

Back to top


Check valves are unstable and unusable.


from Lebanon, NH

Verified Buyer

Comments about 3/4" Check Flange Set:

The check valves that come with these flanges are held in place only by a soft rubber grommet. You can easily push the check valve out of the flange with your thumb. Screwing a nipple into the flange does not stabilize the check valve since it is smaller than the nipple ID. These check valves could easily come loose after installation and go floating through the system. It's hard to believe Wilo even sells them. Otherwise the flanges are fine.


not what is pictured

By plumbob

from sudbury, ma

Verified Buyer

Comments about 1-1/4" Check Flange Set:

unhappy with the way the check valve is mated with flange. these are cheap and the iron is poor. have used many times, but getting fed up.


Great time saver, but a poor design

By plumbob50

from sudbury, ma

Verified Reviewer

Comments about 1" Check Flange Set:

What you get is not what is pictured. You get the green flange with a check valve stuffed in. If you thread in too much, the thread end will start to push the check valve out. I have had one check valve drop into the circulator outlet, and only found out later when repairing the thread leak. These are great except that the iron does not mate well with copper x male adapters and will slowly leak if thick pipe dope like Rectorseal Tru Blu is not used.


Work great

By Bigshrub

from Pennsylvania

Verified Buyer

Comments about 1" Check Flange Set:

Far less money, quicker, and easier than installing a flo-check. I have used a couple dozen of these without any issues.
On the negetive side: they have some resistance to flo, but so does the flo-check they replace.


Perfect for my application.

By Jim

from Stratford, CT

Verified Buyer

Comments about 3/4" Check Flange Set:

I used this along with a PEX valve and PEX-to-MPT adapter to replace a B&G Check-Trol isolation valve that failed after two years. The check valve in this Wilo flange is replaceable, but the flange is inexpensive enough that you can replace the whole thing if it fails at some point. If your circulator is in good shape (I used it with a Taco 007 that's only a couple years old), you can use this to replace a bad check valve without having to buy a new circulator with a built-in check valve. It's only been installed for a week so I can't comment on it's longevity, but so far so good.

Displaying reviews 1-5

Back to top

Q&A: Ask the Questions, share answers

Do you have questions about this product?

Get answers from real customers and in-house experts with AnswerBox.

1 Question | 1 Answer
Displaying question 1
  • 1" Check Flange Set


    Hello, can I use these Flanges for a Grundfos Alpha 2 pump?
    Asked on 6/17/2011 by Anonymous

    1 answer



      Yes, you can.

      Answered on 6/21/2011 by PexSupply Staff from NY
Displaying question 1

Do you have a question about this product?