The Cast-A-Seal 964 is a simple cast-in pipe- to-manhole connector that offers a watertight flexible connector that is cast into the structure when the concrete is poured. The key lock is integrally cast-in during the production process providing a secure seal for storm water and sanitary collection systems.
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.
|TYPICAL TEST RESULTS for CAST-A-SEAL 964 (as in ASTM C 923 and C 1478)|
|Test||ASTM Test Method||Test Requirements||Typical Result|
ACID and 1N
|D 534, AT 22ºC FOR|
|NO WEIGHT LOSS|
NO WEIGHT LOSS
|TENSILE STRENGTH||D 412||1200 PSI, MIN.||2100 PSI|
|D 412||350%, MIN||525%|
|HARDNESS||D 2240 (SHORE A|
|±5 FROM THE|
|D 573, 70± 1ºC|
FOR 7 DAYS
|DECREASE OF 15%,|
MAX. OF ORIGINAL
TENSILE STRENGTH, DECREASE
OF 20%, MAX.
|COMPRESSION TEST||D 395, METHOD B,|
AT 70ºC FOR 22 HRS
|DECREASE OF 25%,|
MAX. OF ORIGINAL DEFLECTION
|WATER ABSORPTION||D 471 IMMERSE 0.75|
IN DISTILLED WATER
AT 70ºC FOR 48 hrs
|INCREASE OF 10%,|
MAX. OR ORIGINAL BY
|OZONE RESISTANCE||D 1171||RATING 0||PASS|
|D 746||NO FRACTURE AT -40ºC||PASS|
|TEAR RESISTANCE||D 624, METHOD B||200 LBF/IN. (MIN.)||450 LBF/IN|
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.