Instructions / Assembly

System 636 Installation Methods

5. Support and Restraint Spacing

(a) System 636 PVC and CPVC systems must be supported horizontally at a maximum of every 5 ft (1.5 m).

(b) Supports to be used on System 636 pipe shall be suitable for use on plastic pipe and shall not be tightly clamped onto the pipe to

allow for possible expansion/contraction movement. Pipe clamps or hangers shall not have sharp edges or fulcrum points which might

damage the System 636 pipe over time.

(c) Changes in direction (e.g. 90° elbows) should be supported as close as practical to the fitting to avoid introducing excessive torsional

stresses into the system. This is especially important for vertical 90º bends. If support is being applied to the fitting, then the fitting must

be free to move during expansion and contraction of the venting system.

(d) System 636 horizontal venting shall be supported with steel strapping or equivalent. Strapping shall meet the following requirements.

• 1/2" strapping - 22 gauge steel • 3/4" strapping - 28 gauge steel

Strapping shall be fixed to supporting structure (e.g. floor joists or cross members) using typical framing nails or screws.

(e) In order to adequately support the weight of vertical vent pipe, a pipe anchor or support shall be installed at the first floor penetration

and every second floor thereafter with a System 636 coupling installed immediately above it. Securely fasten pipe anchors or supports

to the building structure. Pipe anchors or supports used for this purpose shall be suitable for use with plastic pipe. These anchors or

supports shall be snugly fastened to the vent in order to support the weight of the vent, but shall not be allowed to deform or damage

the vent. Anchors or supports supporting the weight of the vertical vent shall be in addition to the required pipe straps which are

intended only to maintain the position of the vertical vent while allowing for expansion and contraction. Make certain that allowance for

expansion and contraction is provided in all venting installations.