Aqua-Hot™ Hydronic Heating System Installation Manual 07/05
Page 29
Domestic Hot
Water Plumbing
Overview
3.12 Domestic Hot Water Plumbing Overview
One major feature of the Aqua-Hot is that it possesses the ability to provide a continuous
supply of domestic hot water. Because the Aqua-Hot heats the domestic water
on-
demand,
there is no need for a separate Storage Type Water Heater. Adhering to the
following guidelines will ensure maximum domestic hot water efficiency.
A. The following information concerning the sizing of Water Supply Piping was taken
directly from the ANSI A119.2/NFPA 501C Standard on Recreation Vehicles, 1993
Edition. This information should be used as a general guideline:
“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 or siphoning.”
The size of Water Supply Piping and Branch Line shall not be less than shown in
Table 4-6.5.1.
NOTE:
A Water Heater or Ice Maker shall not be counted as a Water-Using Fixture
when computing pipe sizes.
Table 4-6.5.1 Minimum Size Tubing and Pipe
for Water Distribution Systems*
*
Minimum size for toilet water supply line shall not be less than the size recommended by the toilet
manufacturer
** 12-feet (3.7 m) maximum length allowable only from water service connection to a single fixture.
*** 6-feet (1.8 m) maximum length.
NOTE:
The Aqua-Hot is equipped with a Pressure-Relief Valve, which releases
excessive pressure in the domestic water system, if necessary.
Number of
Fixtures
1
2
3
4
5 or more
Inner Dia.
(inches)
1/4**
1/4***
3/8
3/8
1/2
Outer Dia.
(inches)
3/8**
3/8***
1/2
1/2
5/8
Iron Pipe Size
(inches)
3/8
3/8
1/2
1/2
1/2
Tubing
Pipe
SECTION 3: INSTALLATION PROCEDURES
