Plans for Developing a Rainwater Cistern or Hauled Water ... - ATSDR
Plans for Developing a Rainwater Cistern or Hauled Water ... - ATSDR
Plans for Developing a Rainwater Cistern or Hauled Water ... - ATSDR
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A roof washer / filter<br />
shall be provided <strong>f<strong>or</strong></strong><br />
each 1500 square feet<br />
of roof area.<br />
Examples of Home Built Roof Washers<br />
Tile barrel <strong>or</strong><br />
concrete tank<br />
From roof<br />
Removable<br />
debris trap<br />
Concrete base<br />
From roof<br />
Tile, barrel <strong>or</strong><br />
concrete tank<br />
12” to 18” high<br />
min. 15” diameter<br />
Sealing medium<br />
Concrete base<br />
(4” thick)<br />
Gravel bedding<br />
<strong>f<strong>or</strong></strong> stability<br />
TOP VIEW<br />
Wire screen<br />
with 1⁄ 4” holes<br />
4” diameter<br />
Wire screen with<br />
1⁄ 4” holes<br />
Removable debris trap<br />
Weep hole to<br />
drain after rain<br />
( 1⁄ 4” diameter)<br />
To cistern<br />
1⁄ 4” weep hole<br />
Air gap<br />
4” diameter<br />
Ground level<br />
To cistern<br />
NOT TO SCALE<br />
Example A<br />
Note: Problems will<br />
occur with these<br />
devices if not properly<br />
maintained on a<br />
routine basis.<br />
Example B Example C<br />
Concrete base<br />
From roof<br />
Barrel<br />
Removable<br />
debris<br />
trap<br />
From roof<br />
Approx. 6”<br />
Barrel min.<br />
15” diameter<br />
Concrete base<br />
(4” thick)<br />
4” dia.<br />
hole<br />
TOP VIEW<br />
Wire screen<br />
with 1⁄ 4” holes<br />
Hole 4” diameter<br />
12” to 18”<br />
high<br />
Gravel bedding<br />
<strong>f<strong>or</strong></strong> stability<br />
Weep<br />
hole<br />
to drain<br />
after<br />
rain<br />
1⁄ 4” dia.<br />
Air gap<br />
Wire screen<br />
with 1⁄ 4” holes<br />
To cistern<br />
1⁄ 4” weep hole<br />
Removable debris trap<br />
NOT TO SCALE<br />
Ground level<br />
To cistern<br />
5<br />
From roof<br />
Tile barrel <strong>or</strong><br />
concrete tank<br />
Removable<br />
debris trap<br />
Concrete base<br />
From roof<br />
Approx. 6”<br />
Tile, barrel <strong>or</strong><br />
concrete tank<br />
12” to 18” high<br />
min. 15” diameter<br />
Sealing medium<br />
Concrete base<br />
(4” thick)<br />
Hole 4”<br />
diameter<br />
Wire screen<br />
with 1⁄ TOP VIEW<br />
4” holes<br />
Hole 4” dia.<br />
Weep<br />
hole<br />
to drain<br />
after<br />
rain<br />
1⁄ 4” dia.<br />
Air gap<br />
Wire screen<br />
with 1⁄ 4” holes<br />
To cistern<br />
1⁄ 4” weep hole<br />
Removable debris trap<br />
Ground level<br />
Gravel bedding<br />
<strong>f<strong>or</strong></strong> stability To cistern<br />
NOT TO SCALE
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