DISSIMILAR PIPE COUPLER BUTT JOINT

INSTALLATION AND SPECIFICATIONS

CLEAN THE EXTERNAL SURFACE OF THE JOINT TO INSURE THAT FOREIGN MATERIALS DO NOT INTERFERE WITH DIRECT CONTACT BETWEEN THE COUPLER AND THE JOINT

PLACE AND CENTER COUPLER UNDER PIPE JOINT (FIG 1)

(FIG 1)

PEEL RELEASE FILM FROM SURFACE OF COUPLER AND

PULL AROUND SPANNING THE JOINT CREATING THE OVERLAP AT THE TOP OF THE PIPE (FIG 2)

ENGAGE BAND TAILS INTO THE TAKE-UP HEAD AND,

USING THE PROPER TOOL, TIGHTEN THE BANDS.(NOTE: TIGHTEN BANDS ON LARGER OD FIRST) (FIG 3 & 4)

(FIG 2)

(FIG 3)

(FIG 4) (FIG 5)

REMOVE PROTECTIVE FILM FROM THE CLOSING FLAP AND COVER THE EXPOSED PORTIONS OF THE STRAP (FIG 6 & 7)

(FIG 6) (FIG 7)

ALL PIPE JOINTS SHALL BE SEALED WITH AN EXTERNAL COUPLER. FOR DISSIMILAR PIPE CONNECTIONS, THE DISSIMILAR PIPE COUPLER AS MANUFACTURED BY MAR MAC CONSTRUCTION PRODUCTS OR AN APPROVED EQUAL AND SHALL BE INSTALLED ACCORDING TO THE MANUFACTURER’S RECOMMENDATIONS. THE COUPLER SHALL HAVE AN OUTER COVER OF POLYETHYLENE WITH AN UNDER LAYER OF RUBBERIZED MASTIC THAT IS REINFORCED WITH A WOVEN POLYPROPYLENE FABRIC LAMINATED TO A SECOND LAYER OF RUBBERIZED MASTIC AND POLYETHYLENE. THERE SHALL BE A PEELABLE PROTECTIVE RELEASE FILM AGAINST THE MASTIC THAT IS REMOVED WHEN THE COUPLER IS APPLIED TO THE JOINT. SECURING STRAPS SHALL BE INCORPORATED WITHIN THE COUPLER, TWO EACH ON EITHER SIDE OF THE BUTT JOINT. THE SECURING STRAPS SHALL BE ISOLATED FROM THE MASTIC ALLOWING THE STRAPS TO TENSION WITH EQUAL FORCE AROUND THE PIPE CIRCUMFERENCE. THE COUPLER SHALL BE (*)” IN WIDTH AND DESIGNED SO THAT WHEN IT IS APPLIED AROUND THE JOINT THE ENDS SHALL OVERLAP A MINIMUM OF 8”. AFTER THE STRAPS ARE SECURED, A POLYETHYLENE/MASTIC FLAP SHALL COMPLETELY COVER THE STRAPS. THE COUPLER SHALL BE PLACED AROUND THE PIPE, MASTIC SIDE TO THE PIPE, SPANNING THE JOINT. THE PROTECTIVE RELEASE FILM SHALL BE REMOVED AND THE COUPLER APPLIED WITH THE OVERLAP AT THE TOP OF THE PIPE. THE STRAPS SHALL BE SECURED (OUTSIDE STRAPS FIRST) ON THE LARGEST OD PIPE WITH THE PROPER TOOLS, THE SECURING STRAPS ON THE OUTSIDE OF THE SMALLER OD SHALL THEN BE SECURED, THE INSIDE STRAP SHALL BE TIGHTEN LAST. THE CLOSING FLAP SHALL COVER THE EXPOSED STRAP WORK AREA, COMPLETING THE JOINT.

MAR MAC CONSTRUCTION PRODUCTS CO., INC.

PO BOX 447 334 N 7TH STREET MCBEE, SC 29101

843-335-5814 FAX: 843-335-5909 WWW.MARMAC.COM