Iowa Admin. Code r. 567-49.17 - Well caps, seals, and vents
(1)
Caps and seals.
a. A well cap shall be used on any well not
protected by a wellhouse and shall seal tightly against the casing to prevent
surface water, dirt, insects, or any foreign matter from entering the
well.
b. The well casing shall
terminate at least one foot above the finished grade surface.
c. A split-top sanitary seal may only be used
on a well terminating within a wellhouse.
d. Any openings in the cap or seal, such as
for pump wiring, water depth measurement, or chemical feed, shall be properly
grommeted or sealed, except for properly screened and oriented vent
openings.
e. There shall be no
openings through the well cap except for a factory-installed vent, air-line
chemical feed, and power supply wiring unless a proposal is submitted to and
approved by the administrative authority. To be approved, a proposal shall show
that any entrance into the well cap is watertight, prevents surface water from
entering the water supply, is secured in position, is only removable with
tools, and is resistant to weathering and corrosion.
f. Well pump systems that are not under
continuous pressure and have no pressure tank may discharge out of the top of
the well if all connections are watertight welds or grommeted openings.
Venting, heights, and other cap requirements shall be met.
(2)
Vents. A well cap used
on a well that has a pitless adapter or pitless unit shall have a screened vent
hole at least ½ inch in diameter, pointing downward, with not less than
24-mesh noncorrosive screen. Vent openings shall terminate at least 12 inches
above finished ground surface. Venting is required on all wells, except Class 3
wells or flowing wells.
Notes
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