Coachmen: Coachmen Mirada - Water Valve Panel Explained

[RV_ThereYet]

Greetings All,
The family and I have been enjoying our time with our 1999 Coachmen Mirada 300QB, but I have been bothered (nay, plagued with doubt and curiosity) every single time I have to use the infamous "water valve panel." I've searched several times (in vain) to find a definitive explanation of the inner workings of this system, always resulting in an empty-handed retreat. Well... I'd finally had enough, and dove in headfirst to uncover the decades-long mysteries that veil the Coachmen Mirada 300QB plumbing.

I know that this may not interest many folks anymore, simply due to aging of these coaches. I know that this is 20 years too late. I know that some folks are content "paying no attention to the man behind the curtain" that pulls the levers and makes the Mirada water flow. But... for the scant few individuals who are still care out there; for the stragglers who are buying these good 'ol coaches and keeping 'em alive... I present to you...

THE DEFINITIVE COACHMEN MIRADA WATER PLANEL EXPLAINED.
(jpgs to follow; see attachments for PDFs of general system and valve layout, routing of water under common use positions, and even a "bonus" setting I use for sterilizing).

Seriously... I hope this helps some of you!

[RV_ThereYet]

[jacko1954]

RV ThereYET. Thanks for these Schematics , I have a 321DS down under in Australia and it looks the same regards the layout. I have a situation where 2 of the plastic valves have an odd drip developing on the back of valve. Which will require replacing the existing with different valves?? Not sure if the original type or similar are available? Cheers Jacko

[RV_ThereYet]

Originally Posted by jacko1954

RV ThereYET. Thanks for these Schematics , I have a 321DS down under in Australia and it looks the same regards the layout. I have a situation where 2 of the plastic valves have an odd drip developing on the back of valve. Which will require replacing the existing with different valves?? Not sure if the original type or similar are available? Cheers Jacko

Hi Jacko,
Thankfully, I have not had to replace the actual valves in my coach/water panel, but I have heard of a few others having to do so. It seems that the most common cause of leaks from these valves are the internal o-rings (as seen here [not my website] Water valves – repair, o-rings, and replacement – 2001 Coachmen Mirada 300QB). It seems many have had success pulling the valve body, replacing the o-rings, and repacking. If that doesn't work in your case, you'll need to measure the water supply lines in your coach (seems most are fitted with 1/2" pex) and source a new replacement 1/4 turn shutoff valve accordingly.

Hope this helps!