248 CMR, § 10.07 - Joints and Connections
(1)
Copper Tubing (Potable Water Supply).
(a) Joining methods shall be in accordance
with the manufacturer's installation instructions and the following:
1.
Soldered.
a. Every soldered joint for tubing shall be
made with fittings.
b. Surfaces to
be soldered shall be thoroughly cleaned, reamed, and returned to
full-bore.
c. The joints shall be
fluxed properly and fastened using lead free solder.
d. Joints shall be made by appropriate use of
brass or wrought copper water fittings and be properly soldered
together.
e. Solder filler metals
used in the fabrication of solder joints in potable water applications shall be
lead free.
2.
Flared Copper Tubing. Every flared joint for
soft-copper water tubing shall be expanded with a flaring tool.
3.
Threaded.
a. All burrs shall be removed
b. Pipe ends shall be reamed and returned to
size of full bore and all chips shall be removed.
c. Pipe joint compounds and tapes shall be
used on male threads only.
d.
Threaded joints used in the piping systems of the potable water supply system
of a building shall be made with lead free polytetrafluoroethylene
sealant
e. Every joint
transitioning from copper tubing to threaded pipe shall be made by the use of
brass or wrought copper adapter fittings.
4.
Brazed. Brazing
filler metal and brazing fluxes utilized for the fabrication of brazed joints
in domestic water supply and potable water distribution system piping shall be
lead free.
5.
Mechanical Joints. All joining methods must follow
material manufacturers' installation instructions.
a. Press-connect;
b. Push-fit in accordance with the proper
standard;
c. Compression;
d. Grooved;
e. Flanged;
f. Tee Forming;
g. Ductile Iron;
h. Other Board Approved joining
methods.
(2)
Cast Iron Soil
Pipe.
(a) Caulked Joints firmly
packed with oakum or hemp shall be:
1. filled
with molten lead that is not less than one inch-deep and does not extend more
than C inch below the rim of the hub; and
2. Have lead run in one continuous pour and
shall have the lead caulked tight.
(b)
Resilient
Gaskets.
(c)
Hub-less Cast-iron Soil Pipe. Joints for hub-less
cast-iron soil pipe and fittings shall be made with,
1. elastomeric sealing sleeve, stainless
steel clamp, clamping screw and housing.
2. Hub-less stainless-steel clamps for
installation underground shall be listed for that type of installation by the
clamp manufacturer.
(3)
Aluminum DWV
Pipe. Joints for connecting aluminum DWV pipe or aluminum DWV pipe
to hub-less cast iron fittings shall be made with:
(a) an end capped adaptor; and
(b) an elastomeric sealing sleeve and
stainless-steel clamp, clamping screw and housing.
(4)
Plastic.
(a) ABS, PVC and CPVC shall be installed in
accordance with the manufacturers' installation instructions and joined using
the following methods:
1. Solvent weld
following the primer and solvent manufacturer's installation instructions.
Where primers are required, they shall be purple in color.
Exception: Clear primer shall be allowed which is
detectable by ultra-violet light. The licensee shall make a UV light detection
device available at the time of inspection.
2. Mechanical joints;
3. Threaded joints;
4. Shielded stainless-steel clamps.
(b)
Cross-linked
Polyethylene (PEX).
1. All pipe,
fittings and accessories used in the installation of Cross-linked Polyethylene
(PEX) piping systems shall be approved by the product manufacturer for use with
their system.
2. All joints shall
be made with pipe and fittings joined in the following manner:
a. Flared joints with tools specifically
designed for use in this type of system and in accordance with the product
manufacturers installation instructions
b. Mechanical joints installed in accordance
with the product manufacturers installation instructions.
c. Push-fit joints installed in accordance
with the product manufacturers installation instructions.
d. Compression joints installed in accordance
with the product manufacturers installation
instructions.
(c)
Polypropylene
(PP).
1. All pipe, fittings and
accessories used in the installation of Polypropylene (PP) piping system shall
be approved by the product manufacturer for use with their system.
2. All joints shall be made with fittings
joined in the following manner:
a.
Heat-fusion.
i.
socket type;
ii. butt
fusion;
iii. electro
fusion.
b.
Mechanical and Compression.
c.
Threaded.
(5)
Stainless Steel.
(a)
Mechanical
Joints.
1. All joining methods
must follow the material manufacturers installation instructions.
a. Compression;
b. Grooved;
c. Flanged;
d. Threaded;
e.
Press-connect.
(b)
Welded
Joints.
(6)
Slip and Ground Joints.
(a) Every slip joint shall be made using
proper packing or gasket material. Slip joints may only be used on the inlet
fixture side of a trap. See 10.07: Example
1.
(b) Ground joint
connections that allow the adjustment of piping while providing a rigid joint
when made up shall be allowed within the trap seal. See 10.07:
Example 2.
(c)
Devices including strainers, PO (pull out) plugs, tail pieces, waste arms,
bathtub wastes and overflows, and any other similar fixture to trap connections
made of ABS, PVC, copper alloy or other non-corrosive metal shall have a
thickness greater than or equal to 17 gauge.
10.07: Example 1 - Slip Joint
Click to view image
10.07: Example 2 - Ground Joint
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(7)
Threaded Joints.
All threaded pipe joints shall be in conformance with American National Taper
Pipe Thread.
(a) ABS or PVC (DWV) joints when
threaded shall use the proper male or female threaded adapters.
(b) Only thread tape, lubricant seal or other
Product-accepted material as recommended by the manufacturer shall be
used.
(8)
Transition Joints Between Different Piping Materials:
(a)
Cast Iron to Copper or Brass
(DWV).
1. Copper or brass soil
pipe adapter with caulked and poured lead joint.
2. Hub-less transition clamp installed in
accordance with the clamp manufacturers' installation instructions.
3. Threaded using the proper copper or brass
threaded adapter.
4. Shielded
stainless-steel transition clamp
(b)
Copper Tubing to Threaded
Pipe.
1. Every joint
transitioning from copper tubing to threaded pipe shall be made by using brass
or wrought copper adapter fittings.
2. The joint between the copper pipe and the
fitting shall be properly soldered and the connection between the threaded pipe
and the fitting shall be made with a standard nominal pipe size connection.
Exception: Other Product Accepted forms of connecting copper to threaded pipe shall be allowed.
3. Dielectric unions and fittings shall be
allowed and water heaters unless prohibited by the water heater
manufacturer.
(c)
Threaded Pipe to Cast Iron. Joints between threaded
brass, stainless steel, galvanized schedule 80 PVC/CPVC or materials listed in
248
CMR 10.13(2) and cast-iron
pipe shall be either caulked or threaded or shall be made with approved adapter
or transition fittings.
(d)
Plastic Pipe to Other Materials. Transitions shall be
made with proper transition fittings listed by the manufacturer for their
intended use.
1.
Cast Iron to PVC
or ABS.
a. Spigot Hub joints
shall be connected by caulking with lead and oakum or by using a compression
gasket that is compressed when the plastic pipe is inserted in the cast iron
hub end of the pipe. No adapters are required for this connection.
b. No-hub joints where the outside diameter
of the two pipes or fittings to be joined are uniform in diameter may be joined
with hub-less transition clamps.
(e)
Aluminum DWV Pipe to Hub-less
Cast-iron Pipe and Fittings. Joints for connecting aluminum DWV
pipe or aluminum DWV pipe to hub-less cast-iron fittings shall be made with
hub-less transition clamps.
(f)
PVC to ABS. Joints for connecting PVC to ABS shall be
made by:
1. using a DWV male to female
adaptor; or
2. by a hub-less
transition clamp.
(9)
Unions (Water Supply & Distribution System).
(a) Ground joint connections that provide a
rigid joint;
(b) Dielectric type
for dissimilar metals.
(10)
Precast
Requirements. Connection of piping concrete tanks shall be by
means of an approved coupling with elastomeric gasket, waterproof flexible
sleeve, or hydraulic cement.
(11)
Connections Between Drainage Piping and Certain
Fixtures.
(a) Connections
between drainage pipes and toilets, floor outlet service sinks, pedestal
urinals, earthenware trap standards or other similar fixtures with floor
outlets shall be fastened with brass, wrought copper, hard lead, iron or
plastic flanges, that is caulked, soldered or solvent welded to the flanged
connection.
(b) A gasket, washer or
setting compound between the fixture and the flange is required.
(c) Brass, stainless steel or other corrosion
resistant nuts and bolts shall be required.
(d) Flanges shall be secured to finished
floor on which it sets using corrosion resistant screw or
bolts.
(12)
Waterproofing of Openings.
(a) Joints terminating at the roof around
roof drains and vent pipes shall be made watertight by the use of lead, copper,
aluminum, or other flashing or flashing materials.
(b) Caps for extended roof flanges shall be
made to fit tight to the inside circumference of the vent pipe. The cap shall
not decrease the pipe opening by more than the thickness of the cap
material.
(c) Exterior wall
openings shall be made watertight.
Notes
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