Instructions / Assembly

System 1738 Installation Methods10

Support and Restraint Spacing

(a) System 1738 PVC systems must be supported

horizontally at a maximum of every 5 feet.

(b) Supports to be used on System 1738 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,

hangers, metal strapping or equivalent shall not

have sharp edges or fulcrum points which might

damage the System 1738 pipe over time.

Strapping shall meet the following requirements

• 1/2" strapping - 22 gauge steel

• 3/4" strapping - 28 gauge steel

Strapping or equivalent shall be fixed to supporting

structure (e.g. floor joists or cross members) using

typical framing nails or screws.

supported as close as practical to the fitting to

avoid introducing excessive torsional stresses

into the system. This is especially important for

vertical 90

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) 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 1738 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 referred to in (a), (b) and (c) above

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.