Tinger
New Member
Hi all. Hoping you can help me out with a strange toilet situation.
I have a Toto CST703, 1.6 toilet, which was installed on the first floor of our house. Upstairs, just over this toilet, we have two bathrooms, both of which work just fine.
This toilet is completely erratic in its flushing. I have replaced the flapper valve several times, and now have a Toto flapper in it THU303, per spec.
Here’s the symptoms:
So is this Toto 703 just a poorly functioning toilet design? Or do I have something else going on?
I’m tempted to yank the toilet and get a Drake or Ultramax, but I’m not sure if I don’t also have a plumbing issue? Venting?
Any suggestions?
Thank you!
I have a Toto CST703, 1.6 toilet, which was installed on the first floor of our house. Upstairs, just over this toilet, we have two bathrooms, both of which work just fine.
This toilet is completely erratic in its flushing. I have replaced the flapper valve several times, and now have a Toto flapper in it THU303, per spec.
Here’s the symptoms:
- Erratic flush – from one to the next, may or may not empty the bowl. It will empty one time, and then maybe or maybe not the next, and doesn’t matter if you flush it again immediately or an hour later. Random.
- Doesn’t matter if you hold the lever down to empty the tank or not. Water level may drop with the flush, but never truly empty
- The flush almost seems like it’s backing up on itself (splashing), but again, I think that’s the design since others have mentioned splashing for this toilet
- At the end of the flush cycle, there’s a pretty noticeable series of sounds, almost like gurgling in the vent pipe – low pitch, hollow-sounding, and only on this toilet
- Upstairs drains and toilets all work fine, and there’s only one roof vent for plumbing, so I assume the vent is OK
- I reamed out the little jets around the edge of the bowl with a drill bit
- I can dump bucket after bucket of water down this thing with no backup
- Erratic any time of day, so I don’t believe it’s water backup in the pipes below the toilet?
- I’ve snaked this thing with a 6’ snake multiple times.
- Good plunging doesn’t appear to change its behavior
- Plugs easily (but I think this is just the toilet design). Plumber put this in, recommending the brand several years ago.
- House is on septic
So is this Toto 703 just a poorly functioning toilet design? Or do I have something else going on?
I’m tempted to yank the toilet and get a Drake or Ultramax, but I’m not sure if I don’t also have a plumbing issue? Venting?
Any suggestions?
Thank you!