underground tank with indoor use & drip irrigation · underground tank with indoor use &...
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![Page 1: Underground Tank with Indoor Use & Drip Irrigation · Underground Tank with Indoor Use & Drip Irrigation Illustrations are for refernce only, other components & designs are acceptable](https://reader030.vdocuments.us/reader030/viewer/2022040316/5e28e9cddac3d1200b4cc8cf/html5/thumbnails/1.jpg)
Underground Tank with Indoor Use & Drip IrrigationIllustrations are for refernce only, other components & designs are acceptable with the approval of Design Engineer and AHJ
©2015 Building in Californiaillustrations by Paddy Morrissey
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Ballast & hold-down required to prevent uplift and shall meet the design standards of the designer and approval by the AHJ
Treated & disinfected stormwater
Potable water shall be a minimum of 12 in. above untreated stormwater
See 3A & 3B for floating inlet alternatives p.3
See detail for airgap alternativep. 6 & 7
Stormwater
![Page 2: Underground Tank with Indoor Use & Drip Irrigation · Underground Tank with Indoor Use & Drip Irrigation Illustrations are for refernce only, other components & designs are acceptable](https://reader030.vdocuments.us/reader030/viewer/2022040316/5e28e9cddac3d1200b4cc8cf/html5/thumbnails/2.jpg)
Underground Tank with Indoor Use & Drip IrrigationIllustrations are for refernce only, other components & designs are acceptable with the approval of Design Engineer and AHJ
©2015 Building in Californiaillustrations by Paddy Morrissey
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Catch basin with media filter
Connections to catch basins and vortex filters shall be through manufacturers’ supplied and ap-proved connections or shall be installed with watertight rings or grommets conforming to ASTM C 923 for concrete structures. Field applied PVC & CPVC bulkhead fittings shall conform to ASTM 1784. Polypropelene bulkhead fittings shall conform to ASTM D 4101.
Vortex filter NOTE: Not all vortex filters or hydrodynamic separators include debris excluders
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![Page 3: Underground Tank with Indoor Use & Drip Irrigation · Underground Tank with Indoor Use & Drip Irrigation Illustrations are for refernce only, other components & designs are acceptable](https://reader030.vdocuments.us/reader030/viewer/2022040316/5e28e9cddac3d1200b4cc8cf/html5/thumbnails/3.jpg)
Underground Tank with Indoor Use & Drip IrrigationIllustrations are for refernce only, other components & designs are acceptable with the approval of Design Engineer and AHJ
©2015 Building in Californiaillustrations by Paddy Morrissey
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3A
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Floating suction inlet with bronze check valve. Check valve acts as a foot valve to maintain prime at pump.NOTE: Floating inlet not only device to accomplish drawing water from tank. Vertical piping may use foot valve and only requirement is water shall be drawn a minimum 4 in. from bottom of tank
Calming inlet and mercury-free float switch.
3B
4 in. min. 4 in. min.
To pump
To pump
Check valveFoot valve
![Page 4: Underground Tank with Indoor Use & Drip Irrigation · Underground Tank with Indoor Use & Drip Irrigation Illustrations are for refernce only, other components & designs are acceptable](https://reader030.vdocuments.us/reader030/viewer/2022040316/5e28e9cddac3d1200b4cc8cf/html5/thumbnails/4.jpg)
Underground Tank with Indoor Use & Drip IrrigationIllustrations are for refernce only, other components & designs are acceptable with the approval of Design Engineer and AHJ
©2015 Building in Californiaillustrations by Paddy Morrissey
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Locking manhole cover to prevent unuthorized entry.
Minimum 24 in. manhole cover with ring extension
Cover shall be a minimum 4 in. above grade
Vent with 1/8 in. or 3175 micron bug screen to prevent mosquitos and insectsBackwater valve on tank over-
flow. Overflow pipe discharges to bio-swale, raingarden, infiltration device or other approved location. All exposed openings shall be screened with 1/8 in. screen mesh.
See detail example on p.5 forinfiltration device
![Page 5: Underground Tank with Indoor Use & Drip Irrigation · Underground Tank with Indoor Use & Drip Irrigation Illustrations are for refernce only, other components & designs are acceptable](https://reader030.vdocuments.us/reader030/viewer/2022040316/5e28e9cddac3d1200b4cc8cf/html5/thumbnails/5.jpg)
Underground Tank with Indoor Use & Drip IrrigationIllustrations are for refernce only, other components & designs are acceptable with the approval of Design Engineer and AHJ
©2015 Building in Californiaillustrations by Paddy Morrissey
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5A Infiltration Device
Cleanout cover
Manhole may be required for cleaning access
Overflow from storm-water tank
Percolation rates shall bedetermined prior to installationof infiltration devices.
Sample sediment filtration prior to tank inlet
Choose filtration and sediment trap suitable for application
Infiltration Device
![Page 6: Underground Tank with Indoor Use & Drip Irrigation · Underground Tank with Indoor Use & Drip Irrigation Illustrations are for refernce only, other components & designs are acceptable](https://reader030.vdocuments.us/reader030/viewer/2022040316/5e28e9cddac3d1200b4cc8cf/html5/thumbnails/6.jpg)
Underground Tank with Indoor Use & Drip IrrigationIllustrations are for refernce only, other components & designs are acceptable with the approval of Design Engineer and AHJ
©2015 Building in Californiaillustrations by Paddy Morrissey
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Domestic water shut-off
From domestic meter or supply
Reduced pressure backflow device isolation valves
Reduced pressure backflow device
Solonoid valve
Globe valve or circuit setter optional for
throttling & smoothing make-up water
Tank make-up water
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Air Gap Alternative 1
2X diameter of supplynot less than 1 in.
To tank calming inlet
Solonoid valve
![Page 7: Underground Tank with Indoor Use & Drip Irrigation · Underground Tank with Indoor Use & Drip Irrigation Illustrations are for refernce only, other components & designs are acceptable](https://reader030.vdocuments.us/reader030/viewer/2022040316/5e28e9cddac3d1200b4cc8cf/html5/thumbnails/7.jpg)
Underground Tank with Indoor Use & Drip IrrigationIllustrations are for refernce only, other components & designs are acceptable with the approval of Design Engineer and AHJ
©2015 Building in Californiaillustrations by Paddy Morrissey
7
Solonoid valve
2X diameter of supply, not less than 1 in.
Bell reducerlined with1/8 in. screenmesh
Trap primer and P trap shallbe used where the lengthof the calming inlet couldbecome a fouling area &release odors.
Trap primer water shall comefrom pressureized rain water,downstream of particulatefilters & upstream fromdisinfection.
Service valve &Trap primer
Domestic water make-up
Air Gap Alternative 2
To tank calming inlet
![Page 8: Underground Tank with Indoor Use & Drip Irrigation · Underground Tank with Indoor Use & Drip Irrigation Illustrations are for refernce only, other components & designs are acceptable](https://reader030.vdocuments.us/reader030/viewer/2022040316/5e28e9cddac3d1200b4cc8cf/html5/thumbnails/8.jpg)
Underground Tank with Indoor Use & Drip IrrigationIllustrations are for refernce only, other components & designs are acceptable with the approval of Design Engineer and AHJ
©2015 Building in Californiaillustrations by Paddy Morrissey
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100 micron filter
On demand pump (does not require a pressure tank)
Depending on pump type & pressure switch, pressure regulator may be required.
Pump inlet from tank
Priming inlet
Outlet for tank pump out
To drip irrigation
(20-30 psi)Swing check valve
![Page 9: Underground Tank with Indoor Use & Drip Irrigation · Underground Tank with Indoor Use & Drip Irrigation Illustrations are for refernce only, other components & designs are acceptable](https://reader030.vdocuments.us/reader030/viewer/2022040316/5e28e9cddac3d1200b4cc8cf/html5/thumbnails/9.jpg)
Underground Tank with Indoor Use & Drip IrrigationIllustrations are for refernce only, other components & designs are acceptable with the approval of Design Engineer and AHJ
©2015 Building in Californiaillustrations by Paddy Morrissey
9
Typical small pressure tank & pump set up
Level of treatment required is dependent on beneficial use & local water quality standards for that use. Water shall be tested to determine acceptable level of treatment. Check with the AHJ for treatment & use requirements.
Ultraviolet disinfection
To house, common laundry room & toilet flushing
Primer inlet
From tank
Swing check valve
20 micronfilter
5 micronfilter
Carbon block filter
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