Toto Drake 1.6 Gal Water Hammer

[SAS]

I had an odd accident in the basement bathroom where I tripped over my own feet and fell. I caught myself on the toilet, an old Toto model. The good news is that it broke my fall and I didn't get hurt at all. The bad news is that I smashed the back of the tank into the wall and it broke open. The worse news is that the tank for that toilet is no longer available.

So today I installed a new Drake 1.6 Gal. Drake toilet. The installation went quite smoothly, but the toilet has a water hammer when the fill valve shuts. I never had any issue at any of the 4 toilets in this house before. I've attached a picture of the fill valve that came with the toilet. As a short term (or perhaps long term) fix, I took the old Korky valve with the number 528 on it (photo below) from the old toilet and swapped the two. It's relatively new, as I think I installed it 2-3 years ago. Is this a suitable replacement? Should I ask Toto to send me a new Toto fill valve?

 

[Sylvan]

I do not like any fill valves located below the water level no matter what the manufacturers say

Under the toilet tank there should be a globe type of valve and globe valves are for throttling

By closing the valve slowly and allowing the tank to fill you can adjust the volume and velocity to prevent hydraulic shock

 

[Sponsor]

 

[Terry]

TOTO uses three fill valves. The Korky style with the green and the blue caps are nice. You might try Sylvan's idea about turning down the water supply at the feed. I never know what fill valve I'm getting until I open the box.

 

[SAS]

I called Toto and they promptly sent me a new fill valve. This was a blue one like the one in Terry's picture above, although it also has an adjustment for the amount of water that goes to the bowl. It doesn't have the water hammer of the original one that shipped with the toilet and it puts a bit more water in the bowl than the Korky 528 that I had lying around. It's a TSU99A.X