Texas Hill Country. The Heart and Soul of Texas travel blog

Old System with Diesel Burner Assy Removed

Beckett Diesel Burner Assy. Motor is on Left and Fuel Pump and...

Old System as it was installed when our coach was built.

Leak in Boiler System. Leak also underneath where you cannot see

Old System on the ground

Top of old 525 System. Total of 10 lines had to have...

Water Lines with Insulation. Insulation used not for Temperatures but protects PEX...

All LInes were marked for deinstall and install. Do not want to...

Junction Box for Aqua Hot Electric. Also Breaker Box in Coach indentied....

AC Line into New System. Line Protected from outside damage

Electronic control Board. Located adjacent to Aqua Hot. Easy to monitor for...

New DE450 Installed. Not same size as original unit, but looks good...

Front & Top of Unit. Gray Cable on right goes to the...

Zone 1 and 2 boiler out lines to coach heat exchangers.

Molded Right Angle hoses to connect Zone outputs to System. These angles...

DE450 behind the cover. The red tool on the right. bypasses safety...

Controller, Fuel Filter, Expansion Tank etc from top of unit.

Expansion Tank. Exact operation of the one in your vehicle.

Engine PreHeat and Hot Water Control on back of unit. East access...

Mounting Plate as seen from under Coach. Used Butyl Caulk to seal....

Side Protective Unit. Secured by Bolts. Protects Aqua Hot from External Damage

Rear Protective Unit. Color matches flooring. Looks pretty slick. Secured by Bolts


Our Motor Home is equipped with a Hydronic Heating System, which heats water to provide heat as well as a continuous supply of hot water. The unit is a older one, and I noticed a boiler leak during our last inspection. . It was also inspected by 2 different inspectors whose opinion was to replace it. The leak is at the connection between the steel boiler and the cold water inlet.

The original connection is proprietary and is made by welding a copper bushing into the steel tank. This bushing has a smaller copper sleeve where the PEX connection is made. This is the area where the leak was occurring.

Since the old unit and the newer unit weight about 170 lbs I gathered some assistance to do the job.

It takes about a day and the pictures will tell the story. Hope you enjoy. The new system is working great. You can check the Aqua Hot web site to get a overview of the operation of the Hydronic Systems. If your interested the model we installed is the AHE 450 DE4. The original unit was the Hydro Hot Model 525 with the Beckett Burner. FYI this type of system is also available for Trucks and 5th Wheel RV’s

Please Click HERE for the Aqua Hot Official Website

Please Click HERE for the RV Tech Website on Hydronic Systems. This site is not affiliated with any manufacturer of motorhomes or Hydronic Systems.

Thanks for riding along with us. Sometimes you can travel a long time and not have to repair anything. Like a home or car sometimes you need to turn a wrench.

Have a great week and best of Hot Water and Heat to all of you

Rick & Bandit



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