jbbcd Report post Posted December 31, 2019 Hello, I have a newer Domedic 310 toilet. I'm having a heck of a time trying to figure out why it will not flush water. Yes I have out side & inside water going to it. tested both by disconnecting water line with water gushing out! lol Some times it works some times it doesn't, driving me nuts. I've got a feeling this toilet is water pressure sensitive? I replaced my old 15 year old toilet that never failed (just ugly) with this new toilet & now wish I never have! I already replaced the water valve 2 times, it works great for a few months then starts acting up again....., this will be the 3rd water valve..... What am I missing???? Thanks Share this post Link to post Share on other sites
kaypsmith Report post Posted December 31, 2019 Do you have a pressure regulator on the shore water supply? Welcome to the forum! Share this post Link to post Share on other sites
wildebill308 Report post Posted December 31, 2019 2 hours ago, jbbcd said: What am I missing???? Your old toilet!!! Sorry I couldn't help it. Welcome to the forum. By water valve you mean the one on the toilet? When mine failed it leaked into the tank and filled it. Yes as Kay said what is your water preshure? Bill Share this post Link to post Share on other sites
richard5933 Report post Posted December 31, 2019 Welcome! The manual for the toilet shows that there is a filter screen on the inlet to the water valve. When you pulled the valve did you notice the screen getting clogged? It doesn't take much debris to reduce water flow to nearly nothing, and if there are period of time with no water pressure behind the screen (like when you're between campgrounds) I could see how the debris could loosen up, only to re-clog the screen after a a few flushes. Share this post Link to post Share on other sites
jbbcd Report post Posted December 31, 2019 Kay, I have one of those smaller brass water pressure couplings. Wild, Yes the valve directly inserted & connected into the back of the toilet. I have no Idea what my water pressure is. I will look into a better water pressure gauge. Rich, Yes, that could be the issue? The last time I removed the valve & water line I tried to watch for debris falling out, but as you probably know water is inevitable everywhere when one removes such items. lol The screen did look clean, I realize any debris might have flushed out on disassembly. So my next 2 steps will be: 1) Remove city water & try RV water pump alone. That "should" rule out a water pressure issue. I believe already tried this but will xx check. 2) Remove valve again, inspect/clean screen. Also his time I will turn on the water & let it flow into a bucket to flush out water lines. I have to say, I really dislike like taking the valve off constantly because it involves removing the toilet from the floor. (Toilet is so close to the back wall) argggg.....I have to keep telling myself "I could be back to working full time 8 hrs a day m-f slaving away! so this should be absolutely nothing to complain about!" lol Thanks for helping! Share this post Link to post Share on other sites
jbbcd Report post Posted December 31, 2019 OK, still not flushing..... 1) Disconnected water supply from the toilet. check both city water & RV water both flowing water out of water line that was disconnected from back of toilet. 2) Removed water valve from back of toilet. cleaned it out (no debris at all & didn't need cleaning that I could see). Clean as a whistle, also blew through it both ways as I pushing in the valve. appeared to be working flawlessly. 3) Replaced water valve back into toilet & connected water lines. Still no flushing water. I can see & hear everything wants to work but still no flushing action. 4) Calling Domtic today & to try & find out what is going on. Hope they can put me through to a real teck person that can explain. I don't want to be told just "replace the valve". I would like to know EXACTLY how this toilet works. If I am going to have to be constantly replacing this valve. I will just remove the toilet & throw it directly into the Dumpster. As I mentioned in the original post, I though I purchased a sparkling brand new toilet. Guess I did......you know the old saying "if its not broken, don't *&%$ with it" lol Share this post Link to post Share on other sites
jbbcd Report post Posted December 31, 2019 go figure.... currently closed for the holiday....lol Share this post Link to post Share on other sites
manholt Report post Posted December 31, 2019 jb, did it come with a manual/install instruction? Is there a pdf file you can download? Share this post Link to post Share on other sites
richard5933 Report post Posted December 31, 2019 I'm wondering if this has something to do with the vacuum breaker? The water leaves the water valve and goes up to the vacuum breaker. If that thing gets stuck/clogs it seems that it will cut off the water to the toilet. That might explain why there is so much water in the valve when you change it. I can't find an exploded view of the vacuum breaker itself, so I don't know if there are any flappers or moving parts that could have gotten stuck. For a simple toilet, there are sure a lot of postings on various sites with problems though, so at least you're not alone. Share this post Link to post Share on other sites
jbbcd Report post Posted December 31, 2019 Rich, When I take everything apart, most all excess residual water comes out of the water line its self, not from the (toilet) toilet valve. I wish I knew exactly how the vacuum breaker works. I tried pushing the vacuum breaker open & close while I operate the flush pedal, I see no difference....... Share this post Link to post Share on other sites
richard5933 Report post Posted December 31, 2019 Have you confirmed that the water will continue to flow from the toilet supply line if the valve is open? Put the end in a bucket and open the water supply valve. Could be a blockage behind the supply valve and not in the toilet at all. If the supply is confirmed to be good, and you've confirmed that the toilet's valve works, then other than a few feet of plastic tubing and the vacuum breaker I don't see any parts which could be involved. Share this post Link to post Share on other sites
kaypsmith Report post Posted December 31, 2019 Is the supply line from the cutoff valve plastic or is it one of those stainless steel braided rubber hoses? I have seen the braided ones with too much kink do similar to yours. Share this post Link to post Share on other sites
rayin Report post Posted December 31, 2019 I agree with the vacuum breaker theory. To test this, when you reassemble the toilet, leave the line to the vacuum breaker off of the breaker and put it in a 1G jug, then briefly push the pedal enough to determine if water flows. I realize you've had this unit apart many times, however if you don't already have one, here is the parts list. Share this post Link to post Share on other sites
manholt Report post Posted January 1, 2020 I had one of those & only problem was preventing seal from leaking as it got older. Share this post Link to post Share on other sites
jbbcd Report post Posted January 1, 2020 Rich, Oh am I dumb!!!!! why didn't I try that while it was apart!! here we go again! lol Kay...., Yes its a small 6-8" braided stainless steel hose.....I'll fiddle with that before I take it apart again.... Thanks! Yahoo!!! finally getting some where I think... So I tested the valve still connected to water line but removed the vacuum breaker line. Very little water spewing out of the valve as I press it manually. I'm guessing, that does lead me to a faulty valve. If so, why am I going through so many valves, just seems ridiculous. Share this post Link to post Share on other sites
richard5933 Report post Posted January 1, 2020 My kitchen sink has periodic problem with the hot water having almost no water pressure. Ended up being a problem where the braided line connected to the brass fitting - the rubber was deformed when it was tightened down which flapped around in there. Annoying. Not saying that this is your problem, but please verify that the water flow to the toilet is consistent. If the water flow to the toilet is good and consistent, then that leaves the toilet valve. I did see quite a few people having trouble with the toilet valve on the 310. I guess you're lucky, since more people seem to have a problem with it not shutting off than with it having poor water flow. Share this post Link to post Share on other sites
jbbcd Report post Posted January 1, 2020 Thanks Rich, I will do every thing I can to eliminate this issue, so I will replace that water line. Thanks Ray for the parts info.... Happy New Year! Share this post Link to post Share on other sites
jbbcd Report post Posted January 14, 2020 wow... its really hard to believe. The braided 8"stainless steel connector hose was the problem the whole time! it was not kinked at all as far as I could see. I even straighten it out with no success. I ended up replacing the braided line with a 6" regular white plastic line & all is good now. Thanks again! Share this post Link to post Share on other sites
richard5933 Report post Posted January 15, 2020 Glad to hear you got it figured out, and that it ended up being something simple. Those braided water lines always seem so durable to look at, but you never really know what's going on inside them or what's the state of the rubber inside them which actually carries the water. Share this post Link to post Share on other sites
huffypuff Report post Posted January 15, 2020 Wow, 2 weeks without a toilet, glad you got it fixed. You can go now. Share this post Link to post Share on other sites
