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Graf Multi-shaft Stormwater System - 24
Graf Multi-shaft Stormwater Management System - 24 in.

The new Multi-shaft stormwater management system consists of modular components for filtration, stormwater control, infiltration/detention systems, inspection shafts, choke drains and pump wells.

Basic system consists of inlet, distributor module and pedestrian telescopic riser.


Product Code: 6075MS24

Currently in stock

Web Price: $1,399.95

$149.00 Flat-rate Discounted Freight
48 States Shipping + $149.00 

qty:


Standard Basic System:

The Standard Basic System includes Inlet Module, Distributor Module and Telescopic Riser for Pedestrian loading. Options for vehicle loading, filtration, choke drain and vertical extension may be added as needed.

The Multi-shaft System Overview:

The shaft modules are available in 16” and 24” diameters to accommodate access, pipe size and flow requirements of the application. All segments include EPDM seals for watertight connection. Available options include pedestrian and vehicle loading lids, slotted cast iron lids for surface water pre-filtration, infiltration strainer basket and a variable aperture infiltration choke drain. Available options vary per model size.

Available Components - 24" Series

Model No.

Description

Part No.

Online Price


Maxi Telescopic Riser, 24 in.

With PE Lid for pedestrian loading.
Green grass color
371011$399.95Included

Infiltration Inlet Module, 24 in.

Used for rainwater and stormwater inlet and normally houses the optional infiltration filter basket

Includes EPDM seal for telescopic dome shaft.

Inlet sizes: 6", 8", 10" and 12" (dual inlet)

330360$499.95Included

Extension Module, 24 in.

To allow greater installation depths. Multiple extensions may be used.

Extends vertical depth by 12"

371003$299.95Call

Infiltration Distributor Module, 24 in.

Distributes water to 1 or more outlets to an infiltration, retention or detention system.

Outlets ship sealed for pump well applications.

Dual 6" outlets and a flat mounting surface for one additional connection

330361$529.95Included
Vehicle Loading Riser, 24 in.

With cast iron lid. Replaces pedestrian riser.
371020$799.95Call

Infiltration filter basket, 24 in.

Stainless steel basket installs into the infiltration inlet module.

0.50 mm mesh width

340523$499.95Call

Choke Drain Insert, 24 in.

Variable aperture selector plate for delayed release of 31-206 GPM with emergency bypass

6" connections

330523$339.95Call


Multi-shaft Application Drawings:

As a Filter Shaft


As an Inspection Shaft


As an Infiltration or Swale Ditch Overrun


As a Choke Drain Shaft or Pump Well

 

24" Choke Drain Flow Rate Setting
(infinitely adjustable in this range)

Gallons per second

Gallons per minute

16 liters per second

4.23

254

13 liters per second

3.43

206

5 liters per second

1.32

79

2 liter per second

0.53

31.7

Measurements16"24"

Total height (htotal)
min.
max.
63.2”
206.0”
66.50”
205.0”
Telescopic (t)min.
max.
4.5”
16.5”
5.5”
17.3”
Height of inlet module (h1)


26.7”

25.6”

Height of distributor module (h2)


39.4”

39.4”

Inlet depth (z)

min.
max.

17.7”
169.6”

18.7”
156.9”

Drain depth (a1)

min.
max.

33.3”
175.8”

37.4”
175.8”

Drain depth (a2)

min.
max.
49.6”
192.1”

53.7”
192.1”

Diameter (d)

min.
max.

18.7”

27.2”

Connections
Inlet

6”/8”

6”/8”
and 10”/12”
Drain

Qty-2: 6”

Qty-2: 6”

Ø Access (e)


16”

24”





Download Graf Multi-shaft Spec Sheet (577 KB)

Download Graf Multi-shaft Brochure (5.6 MB)

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