Domestic Water System
Plumbing the Heating Loop
©Aqua-Hot®
400D Installation Manual
Rev 220504
©Aqua-Hot®
400D Installation Manual
Rev 220504
p. 23
p. 22
Fuel System
¼” NPT (F)
Diesel Inlet
Port
¼” NPT (F)
Diesel Outlet
Port
Output to the
Aqua-Hot’s Fuel
Inlet Port
Input from Fuel
Tank/Fuel Pick-
Up Pipe
TOP View
Fuel Filter
Figure 42
Figure 43
Domestic Water System Requirements
• Reference A119.2/NFPA 501C Standard on Recreational
Vehicles 1993 Edition for relevant regulatory information
regarding the design of Domestic Water Systems.
• The Aqua-Hot is equipped with a pressure relief valve and a
tempering valve in order to provide safe hot water without
chance of scalding or an over-pressurized system.
• Plumb the domestic water system according to Figure 45.
Figure 44
NOTE:
Extended exposure to household bleach will corrode the
components of the Aqua-Hot that will potentially dramatically
shorten the operational lifetime of the Aqua-Hot. Under no
circumstances is the Aqua-Hot to be exposed to household bleach
for extended periods of time. This type of damage is not covered by
the Aqua-Hot warranty.
Use the RVIA provided table below in order to determine the
proper sizing of pipe and tubing required to ensure maximum
efficiency. The size of the water supply piping and branch line
shall not be less than specified in the table below.
Please note it may be necessary to utilize an accumulator
tank within the domestic water system. Reference Figure 45.
Although the 400D is equipped with a pressure relief valve,
the use of an accumulator tank will help prevent excessive
“weeping” of the valve. Manufactured pressure relief valves
will cause the “seat” in the valve to deteriorate, which can
cause the valve to fail permanently. Be sure to reference the
RVIA’s (Recreational Vehicle Industry Association) technical
publication titled “Recreational Vehicle Plumbing Systems”. To
obtain a copy of this publication, contact RIVE at (730) 620-
6003 or visit them online at www.rvia.org.
NOTE:
As stated directly from the ANSI A119.2/NFPA 501C
Standards on Recreation Vehicles, 1993 Edition:
“
Piping Systems shall be sized to provide an adequate
quantity of water to each Plumbing Fixture at a flow rate
sufficient to keep the Fixture in a clean and sanitary condition
without any danger of back-flow of siphoning
”.
Tempering Valve
Domestic Cold
Water Inlet
Domestic Hot
Water Outlet
WATER SUPPLY PIPE SIZES
