Is this on an older TT that has worked fine until now, or is it a fairly new one that hasn't worked properly from the start? Not that it may necessarily help, but what TT is it?
Are the kitchen and bathroom close near each other with short lines between them? Have you been connecting to clean water sources or something that could have sediment in it? Can you visually see the PEX lines throughout or are some concealed somewhere or behind an enclosed underbelly? Both hot and cold have the same degree of restriction? Has anyone ever done mods to the TT?
Does PEX go up to the faucet and connect with a swivel fitting? If you go to a hardware or plumbing store, you could buy some fittings that would allow you to connect a garden hose to the swivel fitting and reverse pressurize the PEX and see what happens.
As suggested already, it has to be either collapsed or plugged lines, but it seems odd that both hot and cold are affected the same. The diagram below shows a generic RV layout. You can see that it doesn't make a lot of sense for both the hot and cold to have the same amount of pressure loss. Perhaps if you make a sketch of how your system is laid out, it could help diagnosis.
In our 2014 KZ TT, I found a completely kinked PEX line under the dinette seat that fed the shower and fortunately it was in a spot where I could see it.
When you figure it out, don't forget to post the findings!
Are the kitchen and bathroom close near each other with short lines between them? Have you been connecting to clean water sources or something that could have sediment in it? Can you visually see the PEX lines throughout or are some concealed somewhere or behind an enclosed underbelly? Both hot and cold have the same degree of restriction? Has anyone ever done mods to the TT?
Does PEX go up to the faucet and connect with a swivel fitting? If you go to a hardware or plumbing store, you could buy some fittings that would allow you to connect a garden hose to the swivel fitting and reverse pressurize the PEX and see what happens.
As suggested already, it has to be either collapsed or plugged lines, but it seems odd that both hot and cold are affected the same. The diagram below shows a generic RV layout. You can see that it doesn't make a lot of sense for both the hot and cold to have the same amount of pressure loss. Perhaps if you make a sketch of how your system is laid out, it could help diagnosis.
In our 2014 KZ TT, I found a completely kinked PEX line under the dinette seat that fed the shower and fortunately it was in a spot where I could see it.
When you figure it out, don't forget to post the findings!
