Item #: E39
Our Price: $5.99
In Stock, Will Ship On 06/05/2020.
  Invert Tube Backnut (+ $3.99)


Fits a 1” diameter hole. Includes pictured gasket and plain white backnut. Withstands temperatures of up to 140º F. This is the valve used in our Siphonless and Priming Tanks. To install this in your bucket, first drill a 1” hole with a holesaw. Center the hole 2” from the bottom if you will be using the bucket as a primary fermenter, and want to use our Invert Tube Backnut. Center the hole 1 1/8” from the bottom of the bucket if you will be using the bucket as a bottling tank, and do not plan on attaching the Invert Tube Backnut. Put the white gasket on the valve first, so it is on the outside of the tank, not the inside when finished.

These are made by Waddington & Duval in England, and unlike similar spigots, include a unique swivel feature;  the barrel of the valve swivels so you can mount the valve very low in a bucket, and not have it contact a counter top when you put the bucket down. The flow rate is 1 gallon every 75 seconds.

Works well with the Invert Tube Backnut, an accessory that turns this valve into a sediment avoidance valve.


Average Rating:
(based on 11 reviews)

Showing 1 - 5 of 11 Reviews:

Review and Rate this Item
by Ben Hall
on 9/28/2019
from Huntsville, AL
The Mercedes of valves
Bought this value to fit to a 6.5 gallon fermenting bucket that didn't come with a valve.  It was easy to install, doesn't leak, and the ability to rotate the unit allows you to install the value low on the bucket to get all of the beer out while allowing the bucket to sit flat on a counter top.  Fantastic.
by Mike miller
on 6/13/2018
from Colorado
Best transfer valve
Never had a problem with williams valves.
by norden
on 1/3/2017
from arizona
a must have!!!
I just finished putting this, with the invert nut, on the 3 gall. better bottle fermenter.  I HATE using a siphon.  this makes transferring wort so much easier... all my fermenters have this setup... this is a MUST have!!!!
by Dan
on 9/6/2016
from Jacksonville, Alabama
Transfer Valve
Perfect for what I needed
by Marv
on 8/28/2016
from Camano Island, WA
May need to oversize 1" hole
I installed this valve in 8 gallon fermenting and priming buckets purchased from local homebrew store. The wall thickness of those buckets were twice the 6 gallon buckets from Williams. It was very difficult to insert transfer valve in 1" hole (would not thread in at all) and I worried that the threads would be damaged as I forced it in. But struggled to get it in anyway and tightened enough not to leak. Had I possessed a hole saw 1/16th or maybe even 1/8th larger it would have been much easier.
Review and Rate this Item
11/12/2018 8:48:32 PM
Are the valves HDPE 2?
Yes. The manufacturer has it listed as food grade HDPE & Polypropylene.
6/13/2018 9:23:05 PM
I have several of these. A few of them are starting to leak when rotating the entire valve with the invert backnut in place, apparently due to the gasket getting soft from soaking in PBW. Is the gasket available, or do I need to replace the entire valve?
We do not have the gasket as a separate item
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