GPK Gasketed Gravity flow Sewer Fitting Installation Manual

Gasketed Gravity flow Sewer Fitting Installation Guide

Receiving Shipments:

Each shipment shall be inspected with care upon arrival. Each fitting shipment is
carefully loaded at the factory using methods acceptable to the carrier. The carrier is
then responsible for delivering the fittings as received From GPK Products.

Check the materials, gaskets and fittings received against the bill of lading. ANY
DAMAGED OR MISSING ITEMS MUST BE NOTED ON THE DELIVERY RECEIPT
AND RETURNED TO THE TRANSPORTATION COMPANY.

Storage:

Unload shipment not to cause damage to product, store fittings away from any direct
heat sources (engine exhaust, steam lines etc.)
Do not stack heavy objects on top of fittings; this will cause deformation of the fittings.
Do not store in direct sunlight for extended amounts of time.
Gaskets should be covered from UV rays. Gaskets should also be protected from heat,
oil, and grease.

Location of service:

Services should be laid out according to the job plans and specifications.
If field cuts are needed, field cuts should be perpendicular to the axis of the pipe,

smooth and clean from burs.
Field bevels should match factory bevels, typically 15 degrees.

Fitting Inspection/Layout:

Prior to install, if necessary, remove any foreign debris/dirt from pipe and fittings.
Inspected fittings for any defects or damage. Check proper gasket seating and

condition.

Assembly:
Clean the spigot and the bell and gasket
Measure the bell depth of the fitting and mark depth on spigot, different manufactures

have different bell depths, make sure not to over insert the spigot during assembly.

Apply pipe lube that is approved for gravity sewer assembly, don’t not use any

petroleum-based products as these will adversely affect gaskets performance.
Apply lube on the spigot, uniform coat half the length of the spigot, apply even coat of

lube to the gasket.
Push the lubricated spigot end past the gasket into the bell until the insertion line on the

spigot is even with the edge of the bell. DO NOT OVERINSERT.
If you have trouble with assembly, disassemble the joint and examine the gasket. If the

gasket is removable, replace if damaged.
If non-removable gaskets are damaged, you have two options,

1. cut off the bell, bevel the new edge, and use a coupling to assemble.

2. follow GPK’s written instructions on how to replace rieber or mambo gasket.
Be sure that the gasket is properly seated and that the fitting and pipe are in straight

alignment. Repeat assembly steps above. Correct assembly is achieved when the
insertion line on the spigot is lined up with the edge of the bell.

Make sure the fitting and pipe are in straight alignment, also make sure the taper of the
spigot is started over the gasket before apply force to assemble.

The bar-and-block method of joint assembly is recommended, as the installer is able to
feel the amount of force being used and whether the joint goes together smoothly.
Larger pipe may require mechanical assistance to apply sufficient force to assemble the
joint.

When mechanical devices are used, care must be taken to ensure that the spigot is
inserted to the proper depth and that previously assembled joints are not disturbed. This
is accomplished by inserting only to the insertion line on the spigot end. If the spigot is
over-inserted, back the pipe out until the insertion line is visible.

In all cases, straight alignment is essential for proper assembly. If the spigot is
misaligned, over inserted, or assembled with excessive force, the following are possible
consequences: