Quick Guide – Jointing
OsmaDrain
1 of 2
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This Quick Guide is an extract from brochure (ref OD107) Osma Drainage, Product and Installation Manual.
The full document is available for download at www.wavin.co.uk
Preparing Pipe Ends
Pipes cut on site must be clean cut
at right angles to their horizontal axis.
Deburr the cut end with a scraper.
Depth of Entry Mark
Some plain ended fittings have a depth of
entry mark moulded on the spigot. This
depth of entry allows the pipe to expand
into the fitting socket by a minimum of
12mm. Insert the spigot into the socket
until the depth of entry mark is just visible.
All pipes (whether site cut or otherwise)
and other plain ended fittings must be
inserted to the full depth of the socket,
marked at the socket face, and then
withdrawn at least 12mm (See Figure.
10).
Ring Seal Joints
Pipe couplers and most bends and
junctions (in the 110mm and 160mm
sizes) are supplied with sockets on all
ends. These sockets are fitted with ring
seals which act as both a sealing and
expansion joint.
The correct sequence for ring seal jointing
is as follows:
1. Check that the pipe is correctly
prepared (See Pipe preparation,
Figure. 11a) and that the ring seal is
properly seated in its housing.
2. Make sure that both the pipe or fitting
spigot and ring seal socket are dry,
clean and free from grit or dust.
3. Lubricate evenly around the spigot
(NOT the socket) with OsmaDrain
Lubricant (4D392) (See Table 7).
4. Make sure that the components to be
joined are correctly aligned.
5. Push the spigot fully into the socket.
Mark the spigot at the socket face
and then withdraw the spigot by a
minimum of 12mm. If the spigot is
already marked with the depth of
entry, push it into the socket until the
depth of entry mark is just visible.
6. Do not cut back the straight leg
sections of Long Radius Bends
(4D/6D281) as only the spigot end
provided is suitable for jointing.
Figure 10: Ring Seal jointing
Figure 11a: Pipe preparation
Figure 11b: Pipe end
Ring Seal
1. Cut pipe square
2. Chamfer and deburr spigot end
Table 7: Lubricant allowance (for
guidance only) weights
Nominal
Size (mm)
Approximate No. of
joints (per 500g)
82
160
110
100
160
45
