• Cast A Seal 964 in concrete manhole
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Cast-A-Seal 964

Cast-A-Seal 964 is the flexible boot cast-in connector with big advantages. Casting mandrels for 48" manholes eliminate the time and expense of forming or coring holes while ensuring a watertight seal.

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The unique two-step design accommodates pipe from 4.21″ OD to 6.9″ OD, in either manhole or straight wall applications. One of the primary benefits for the precast producer and the underground excavator is the use of CAS964 for grease traps, commercial septic tanks and similar structures.

When it is cast-in to a grease trap it eliminates the need for dual inventories, the same structure can be supplied for both 4″ and 6″ pipes.

Features and Benefits

  • Two-Step design fits almost all pipe from 4.21” OD to 6.9” OD (107 – 175 mm)
  • Casting Mandrels for 3” – 6” (75 – 150 mm) straight-wall applications and for 48” x 5” (1200 x 125 mm) round manhole forms
  • Available with or without a sealed face
  • Simple cast-in design eliminates time and expense of casting or coring holes
  • Patented design allows cast-in connector to be cut out (if damaged or if pipe size changes) and a new connector installed

How It Works

  • Specially developed synthetic rubber is continuously tested and lab-certified to ASTM C-923.
  • The connector is cast into the concrete product when it is made.
  • The large keylock assures a watertight seal between the connector and the concrete.
  • Accommodates deflection and shear loads without losing its seal.

PIPE DIAMETERS: 4″ (100 mm) or 6″ (150 mm)

Cast-A-Seal 964 meets or exceeds:

  • ASTM C923 Standard Specification for Resilient Connectors Between Reinforced Concrete Manhole Structures, Pipes, and Laterals
  • ASTM C1244 Standard Test Method for Concrete Sewer Manholes by the Negative Air Pressure (Vacuum) Test
  • ASTM C1478 Standard Specification for Storm Drain Resilient Connectors Between Reinforced Concrete Storm Sewer Structures, Pipes and Laterals
  • ASTM C1644 Standard Specification for Resilient Connectors Between Reinforced Concrete On-Site Wastewater Tanks and Pipes
  • ASTM F-2510 Standard Specification for Resilient Connectors Between Reinforced Concrete Manhole Structures and Corrugated High Density Polyethylene Drainage Pipes
  • TYPICAL TEST RESULTS for CAST-A-SEAL 964 (as in ASTM C 923 and C 1478)
    TestASTM Test MethodTest RequirementsTypical Result
    CHEMICAL RESISTANCE;
    1N SULFURIC
    ACID and 1N
    HYDROCHLORIC ACID
    D 534, AT 22ºC FOR
    48 HRS
    NO WEIGHT LOSS
    NO WEIGHT LOSS
    NO WEIGHT
    LOSS
    NO WEIGHT
    LOSS
    TENSILE STRENGTHD 412 1200 PSI, MIN.2100 PSI
    ELONGATION AT
    BREAK
    D 412 350%, MIN525%
    HARDNESSD 2240 (SHORE A
    DUROMETER)
    ±5 FROM THE
    MANUFACTURER’S
    SPECIFIED HARDNESS
    <2
    ACCELERATED
    OVEN-AGING
    D 573, 70± 1ºC
    FOR 7 DAYS
    DECREASE OF 15%,
    MAX. OF ORIGINAL
    TENSILE STRENGTH, DECREASE
    OF 20%, MAX.
    OF ELONGATION
    -13% TENSILE
    CHANGE, -14%
    ELONGATION
    CHANGE
    COMPRESSION TESTD 395, METHOD B,
    AT 70ºC FOR 22 HRS
    DECREASE OF 25%,
    MAX. OF ORIGINAL DEFLECTION
    13%
    WATER ABSORPTIOND 471 IMMERSE 0.75
    BY 2-IN.SPECIMEN
    IN DISTILLED WATER
    AT 70ºC FOR 48 hrs
    INCREASE OF 10%,
    MAX. OR ORIGINAL BY
    WEIGHT
    3.50%
    OZONE RESISTANCED 1171RATING 0PASS
    LOW-TEMP,
    BRITTLE POINT
    D 746NO FRACTURE AT -40ºCPASS
    TEAR RESISTANCED 624, METHOD B200 LBF/IN. (MIN.)450 LBF/IN
Download Specifications

 

A flexible pipe-to-manhole connector shall be employed in the connection of the sanitary and storm drain sewer pipe to precast manholes or other structures. The connector shall be CAST-A-SEAL® 964 as manufactured by Press-Seal Corporation, Fort Wayne, Indiana, or approved equal. The connector shall be the sole element relied on to assure a flexible, watertight seal of the pipe to manhole. The connector shall consist of a rubber gasket and one or two external take-up clamp(s).

The rubber gasket element shall be constructed solely of synthetic or natural rubber, and shall meet or exceed the requirements of ASTM C 923. The connector casting mandrel system shall include a precisely-formed opening in the concrete for installation of a replacement connector in the event that the cast-in connector is damaged.

The external take-up clamp shall be constructed of Series 300 non-magnetic stainless steel and shall utilize no welds in its construction. The clamp shall be installed by torquing the adjusting screw using a torque-setting wrench available from the connector manufacturer.

Selection of the proper size connector for the structure and pipe requirement, and installation thereof, shall be in strict conformance with the recommendations of the connector manufacturer. Any dead end pipe stubs installed in connectors shall be restrained from movement per ASTM C 923.

The finished connection shall provide sealing to 13 psi (minimum) and shall accommodate deflection of the pipe to 7 degrees (minimum) without loss of seal.

Vacuum testing shall be conducted in strict conformance with ASTM C 1244 prior to backfill. Other testing shall be conducted in strict conformance with the requirements of the connector manufacturer.

PIPE
O.D./IN
PIPE
DESCRIPTION
CAS 964 Step
4.21
(107 mm)
4” (100 mm) PVC
D3033 OR D3034
4” Outer
4.30
(109 mm)
4” (100 mm)
TRUSS
4” Outer
4.50
(114 mm)
4” (100 mm)
Sched 40/80 PVC
4” Outer
4.80
(122 mm)
4” (100 mm) CI/DI
4” (100 mm) C900
4” (100 mm) HDPE
4” Outer
6.275
(159 mm
6” (150 mm) PVC
3033 OR D3034
6” Inner
6.30
(160 mm)
6” (150 mm) TRUSS6” Inner
6.50
(165 mm)
6” (150 mm) Sched
40/80 PVC
6” Inner
6.625
(168 mm)
6” (150 mm) PVC
D3033 OR D3034
6” Inner
6.90
(175 mm)
6” (150 mm) CI/DI
6” (150 mm) C900
6” (150 mm) HDPE
6” Inner