polythylene underground water storage tank accessories

Darco Underground Water Tanks

1

Polyethylene OcTank module

2000 gallon nominal capacity
Suitable for potable water
NSF 61 listed high density polyethylene potable water approved resin - gray color
May be dry buried, no need to add water during backfill
Maximum soil cover depth 36"
Empty ship weight 800 pounds per module

Price: $1.35 / gallon - R 08/08 / Freight is additional

2

OcTank Installation Details

Each module includes one 18" spool access riser with bolted cover, intended for burial
Installation requires a coarse sand bed and sand backfill to top of tank, followed by a soil cover and mound at grade
Avoid wet locations unless using deadman anchors or a bed subdrain to daylight
Bypass excess rainwater to a remote discharge away from the tank and nearby structures

3

20 inch I.D. segmented spool type polyethylene manway extension

Each stackable flanged riser segment is 18 inches tall
Gray color, UV stabile resin
Includes all bolts and gasket
Stainless steel & brass hardware
Can be shipped individually by UPS

Price: $199.00 for each 18" section / Freight additional if not shipped with tank order

4

3 inch water level inspection hatch on manway cover with cross arms for padlock

Aluminum Cam-Lock design
Includes bolt-in cover fitting
Used to visually check level
May be used for refilling at 50 psi maximum pressure
Padlock by others

Price: $117.00

5

Standard 20" x 30" polyethylene manway extension for 36 inch bury depth below grade

Overlapping hinged cover with padlock hasp and internal rubber dust seal
Gray color, UV stabile resin
Tank entry is 20 inches ID
Upper portion inside diameter is 30 inches for shoulder room and easy access
Includes internal safety cover and poly rope

Price: $264.00 / (includes $301 credit for spool and cover)

6

Locking grade box with aluminum treadbright cover for manway security

26" x 26" square opening
Choose internal bolted cover or easy open poly plug cover
Not automobile traffic rated
Aluminum cover, drop down handle, and holes for padlock

Price: $350.00 / Freight additional if not shipped along with tank order

7

Plug type cover to replace bolted cover on 20 inch I.D. spool risers

Slip fit poly plug with handle
Light weight but durable
Not automobile traffic rated
Not secure without grade box #6

Price: $102.00

8

4 inch or 6 inch PVC vent head

Removable stainless steel insect screen inside (8 mesh standard)
Slotted external poly guard
Includes top hub tank adapter
PVC riser pipe by others

Price: $119.00 4 inch price $220.00 6 inch price

9

Fire hose refill 2.5 inch NST/F swivel mounted on 6 inch vent

Brass NFPA construction
Fire hose thread with swivel and brass plug on lanyard
Refill at 50 PSI maximum pressure
Includes top hub tank adapter
PVC riser pipe by others

Price: $560.00

10

Inspection hatch on 6 inch vent

Aluminum Cam-Lock design
Drilled cross arms for padlock
Used to visually or stick check water level
Should not be used for refilling
Includes top hub tank adapter
PVC riser pipe by others

Price: $370.00

11

2 inch mini vent for manway covers

Mounts on hinged manway or spool with bolted cover
Includes 2 inch bolt-in fitting
Stainless steel insect screen
Louvered plastic guard
PVC riser pipe by others if increased height is needed

Price: $60.00

12

Overflow head assembly

Diverts excess water to remote daylight discharge
Includes swing check valve & galvanized steel rodent guard
Includes flex member at tank
PVC piping run by others

Price: $167.00 2 inch price $266.00 4 inch price $401.00 6 inch price $596.00 8 inch price

13

Float valve water level control

Manway mount on one inch brass pitless adapter
Adjustable float arm for proper air space at top of tank
Brass piping and brass backflow check valve
Includes 1" feed line stainless flex member and PVC adapter
Install to meet plumbing code
Must be field assembled

Price: $285.00 $372.00 Low Level irrigation type

14

Well water inlet filter

Manway mount on one inch brass pitless adapter
Easy to service filter access
Uses universal filter cartridges
Includes 1" feed line stainless flex member and PVC adapter
Includes adjustable bypass pressure relief valve
Install to meet plumbing code
Must be field assembled

Price: $404.00

15

1 inch brass pitless adapter

Installs in manway or spool just above the bolt flange
Rated at 75 PSI working pressure
Includes stainless steel flex member and PVC adapter
Often used with submersible mult-stage deep well style household pressure pumps
Lift up slider to remove pump

Price: $146.00

16

2 inch plastic quick disconnect

Installs in manway collar
2 inch female pipe thread fitting connection for pump
Rated at 25 PSI working pressure
Includes ss flex member, PVC adapter, and 2" tank fitting
Often used with low pressure single-stage dewatering pumps
Lift up slider to remove pump
Price $188

Price: $188.00

17

PVC float tree & float switch kit

Sliding adjustable float position design
Includes 2 mounts with stainless steel hardware
Used to control pumping functions - up or down
Includes one - 3 wire,12 amp, non-mercury, SP/DT switch
1" PVC drop pipe by others
Some field assembly required

Price: $95.00 $62.00 each / Additional switches

18

Submersible bottom suction high pressure Darco pump

120 VAC - 1/2 HP - 50 PSI - 20 GPM discharge capacity
Pump package includes 1 inch pitless adapter in manway
Lift up on T-handle to easily remove pump from tank
Includes 1" ss flex member
Plugged port for optional pressure relief valve

Price: $563.00 $95.00 optional float tree kit / For low water level pump shut down

19

Submersible dewatering type low pressure Darco pump

120 VAC - 3/4 HP - 80 GPM at 10 feet of head
Includes 2 inch quick coupler for manway collar
Lift up on coupler to easily remove pump from tank
Includes 2 " ss flex member
Includes integral low water pump shut down float switch

Price: $506.00

20

Alarm panel for high level or low level water volume alert

120 VAC power required
Plastic weather tight alarm box mounts on post by tank or inside building
Red light and alarm buzzer
Alarm silence switch on outside of box
Includes one float tree kit with one universal float switch
Some field assembly required

Price: $179.00

21

Suspended equipment platform

20" x 24" flat plastic surface
Adjustable up or down and side to side
Maximum open space between spreader tubes is 9 inches
Rated for 100 lbs. max. weight
Field drill plastic platform to mount equipment
Shield tank wall when drilling downward through platform

Price: $164.00

22

High level water control

Prevents "freeze-off" from overfilling above full tank level
Diverts excess water slowly into backfill
Often used on Fire Cisterns
Includes back-flow check valve
Includes inner & outer filters
Use on systems filled by tank truck water delivery only
Do not use with a well or when connected to a city water line

Price: $96.00

23

Bolt-in fittings with internal NPT female tapered threads

Polypropylene bolt flanges
Inner and outer female threads
Rated for 25 psi maximum
Stainless bolts & gaskets included
Field install with a hole saw
Must fit flat both inside and outside for proper seal
Install nuts to inside of tank

Price: $39.00 2" price $169.00 2" all stainless / 75 psi $52.00 3" price $406.00 3" all stainless / 75 psi

24

Stainless flex members with male pipe threads for water inlet fittings and pumped discharge

Heavy clear vinyl jacket or stainless steel braid
Includes one schedule 80 reinforced PVC pipe adapter
NOTE pressure ratings below

Price: $90.00 1" - braided / rated at 75 psi working pressure $105.00 2" vinyl jacket - 25 psi $129.00 2" - braided / 75 psi $159.00 3" vinyl jacket - 25 psi $231.00 3" - braided / 75 psi

25

Tank adapters for top or bottom connections as an inlet or discharge in piping applications

4", 6", or 8" schedule 40 PVC pipeline connection sizes
Includes rubber sealing sleeve & stainless steel twin clamps
Adapters are rubber and eliminate the need for flexible members at these fitting points

Price: $161.00 4" PVC socket $223.00 6" PVC socket $103.00 8" PVC pipe stub

26

Float and dial type mechanical water level gauge

Requires no electric power
Reads the inches of water depth in storage tank
Metal gauge body and weather proof clear viewing lens
Must be field assembled and calibrated by the others

Price: $376.00

27

6 inch NST- Male dry fire hydrant for Fire Service suction drafting

Includes metal cap & lanyard
Removable plastic strainer
90, 45, or straight sch. 40 PVC top fitting angle choice
Includes anti-vortex plate at foot of 6" draw pipe per NFPA
Includes top hub tank adapter
Some field assembly required
6 inch PVC riser pipe by others

Price: $307.00 $60.00 Additional for female swivel head with plug and lanyard

28

Top hub accessory adapter

Choose either 4 or 6 inch sch. 40 PVC vertical riser pipe size
Includes PVC socket coupling above rubber tank seal
Includes stainless twin clamps
PVC riser pipe by others

Price: $42.00 4" size $78.00 6" size

29

Anti-buoyancy anchor cable kit

One kit required per module
Includes 2 galvanized 3/8 inch steel cables with 6 clamps
Includes 6 rubber tank protection guide sleeves
Includes Darco reusable cable tensioning tool (1 per order)

Price: $140.00 per module

30

Cardboard caisson tubes for making deadmen on site

1 form required for each side of modules to be anchored
12" diameter by 90" long
Rebar and concrete by others
May be shipped with tank or purchased by the installer at any local lumber yard

Price: $79.00 per pair

31

Rainwater clarifier inlet package

Includes 1 OcTank module and manway assembly as illustrated
200 gallons per minute maximum inlet flow capacity
Bypass or overflow excess incoming water to remote location
Includes easily removable internal mesh leaf basket and washable poly filter pack
Inlet pipe stub for 6 inch SDR 35 PVC roof leader hook-up
Includes 4" vent assembly
No top interconnect normally installed with this package

Price: $3792.00

32

External leaf and debris basket for gutter downspout leaders

Bury with lid exposed above grade
Locate in leader line between downspout and storage tank
Basket can be easily cleaned
Accepts smooth bore 4" or 6" PVC pipe
Field preparation and assembly required
Rubber connection sleeves and hose clamps by others

Price: $311.00 / Freight additional if not shipped with tank order

33

Manway grommet for rain water inlet pipe connections

Not intended for potable water
Includes rubber grommet and stainless worm clamp
Fits SDR 35 or schedule 40 PVC plastic pipe
4" and 6" sizes available
Field installation required

Price: $26.00 4" size $30.00 6" size

34

Master irrigation module with pump

Includes tank module, pump, manway, vent, and filter assembly as Illustrated above
Inflow capacity 200 gal / min.
Includes low level float valve for minimum automatic refill
Float switch protects pump
Inlet PVC pipe, 6 inch SDR-35
No top interconnect required

Price: $4721.00

Prices subject to change.
Written quotes honored for thirty (30) days only.

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