Fill valve shank length advice

[Gossamer]

Evening Plumbers,
I'm replacing a knackered fill valve with a Viva bottom entry one but the shank length is longer and theres not much give in the pipework.
I dont really want to get loads of different ones to get the right length, is there a way of reducing the Viva shank length?
Cheers.

 

[oldbuffer]

1. The shanks aren't really meant to be shortened.
2. If you are desperate, can work accurately, and it is a standard shank with a flat end for a tap connector then:
2a. Measure the amount you need to remove.
2b. Remove from cistern, and mark amount to be removed on shank threads.
2c. Screw a brass (NOT a plastic) back nut onto the shank, above the cut mark.
2d. Cut through very carefully with a hacksaw, keeping the cut as square as possible.
2e. Use a fairly fine toothed flat file to make sure the end is square to the diameter all around.
2f. Run the nut back almost off the threads, then back on and clean up any burrs. Repeat two or three times.
3. If its a compression (olive) fitting one, you can't do the above.
4. Look at alternatives like altering the fixed pipework and replacing the end of it with a flexible pipe.

 

[Madrab]

What end is on the pipe that connects to the fill valve and pipe material?

 

[polesapart]

Double up on the rubber washer that fits around the threaded shank inside the cistern.

 

[Gossamer]

What end is on the pipe that connects to the fill valve and pipe material?

Its a straight service valve 15mm x 1/2''.

Double up on the rubber washer that fits around the threaded shank inside the cistern.

Seems nice and easy. Any 1/2'' washer?

 

[polesapart]

Pretty much, it's a spacer. Try https://www.toolstation.com/pillar-tap-washer/p74937 or get lucky with adding the old rubber one to the new.

Otherwise, of course, the option of shortening the pipework is always there.

 

[Schrayder]

1. The shanks aren't really meant to be shortened.
2. If you are desperate, can work accurately, and it is a standard shank with a flat end for a tap connector then:
2a. Measure the amount you need to remove.
2b. Remove from cistern, and mark amount to be removed on shank threads.
2c. Screw a brass (NOT a plastic) back nut onto the shank, above the cut mark.
2d. Cut through very carefully with a hacksaw, keeping the cut as square as possible.
2e. Use a fairly fine toothed flat file to make sure the end is square to the diameter all around.
2f. Run the nut back almost off the threads, then back on and clean up any burrs. Repeat two or three times.
3. If its a compression (olive) fitting one, you can't do the above.
4. Look at alternatives like altering the fixed pipework and replacing the end of it with a flexible pipe.

@2e, i find a pice of sandpaper held on a flat surface helps get the cut end square