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  3. BOSSCONN-1.25 Mechanical Boss Connector

McALPINE BOSSCONN-1.25 Mechanical Boss Connector Operating instructions

  • Hello! I've reviewed the product details for the McALPINE Boss Connector BOSSCONN-1.25. This document outlines the installation process for connecting 1 1/4" pipes to soil/rainwater pipes, detailing components like rubber seals, polythene washers, and the threaded flange. I'm ready to answer any questions you have about its features or how to use it.
  • What size of pipe does this connector fit?
    How do I install the threaded flange?
    What should I do before tightening the back nut?
Mechanical Boss Connector : Product Code - BOSSCONN-1.25
1. Locate exact position where 1 ¼” pipe is required to connect and create
hole in the soil/rainwater pipe to the dimensions of 'X'. Use the template if
required.
2. Select the required rubber seal '2' or '3' and along with the polythene washer
'4' plus backnut '5' fit to the threaded flange '1'
3. Insert the threaded flange into the hole at a slight angle and twist through 90°.
4. Push rubber seal and polythene washer along the threaded flange ensuring
they are tight to the soil/rainwater pipe. In the case of the rubber seal '2' ,
ensure the two small round pins are locked inside the soil pipe.
5. Check that the threaded flange is at 90° and fully tighten the back nut making
sure that the rubber seal and washer do not move out of position.
6. Fit 1 ¼” pipe to the boss connector by placing '6', ‘7’ and '8' over the pipe,
inserting the pipe into the connector and tightening the compression nut.
All water from sanitary pipework must be discharged via soil pipe
1. Threaded Flange
2. Rubber Seal for 110mm Soil Pipe
3. Rubber seal for Square Section
Rainwater Pipe
4. Polythene Washer
5. Backnut
6. Rubber Compression Seal
for 1 ¼” BS 5255 Pipe
7. Plastic Washer for 1 ¼” BS 5255 Pipe
8. Compression Nut for 1 ¼” BS 5255 Pipe
Soil/Rainwater pipe
48.5mm (1.910")
60.7mm (2.390")
Mark out this shape
on soil stack before
cutting out hole
'X'
PINS
1
1 ¼” BS5255
Pipe
McALPINE
23/08/2021
C
2 3 4 5 6 7 8
L-BOSSCONN-1.25
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