Plumbing Inspection

Voting section relating to Minnesota Building Codes.

See question below

Poll ended at Tue Aug 31, 2010 2:53 am

Allow transition connections of differing materials? YES
16
48%
Allow transition connections of differing materials? NO
0
No votes
The installer is allowed how many of these couplings? NONE
0
No votes
The installer is allowed how many of these couplings? ONE
0
No votes
The installer is allowed how many of these couplings? SOME
1
3%
The installer is allowed how many of these couplings? UNLIMITED
16
48%
 
Total votes : 33

Plumbing Inspection

Postby forumadmin » Sun Aug 08, 2010 9:11 pm

At a plumbing inspection, it is noticed the installer has made several connections of differing materials throughout the project. Some connections are made with “mission band” type couplings, others are plastics to plastics with adhesives labeled for such uses.

Setting aside glued joints does the plumbing code (4715) allow transition connections of differing materials?

The installer insists there is no limit to the number of times he can make these connections as long as he uses the proper components for each.

The installer is allowed how many of these couplings?
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Re: Plumbing Inspection

Postby the man » Mon Aug 09, 2010 8:06 am

Q #1- yes

Q #2 as many as you want as long as they are approved for that use.
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Re: Plumbing Inspection

Postby Larry Pepin » Mon Aug 09, 2010 9:56 am

Question #1 - Yes

Question #2 - As many as necessary as long as the developed length of the plastic pipe does not exceed 35' cumulative. If the contractor is transitioning from plastic to cast iron then they must continue with cast iron. You don't get another 35' of plastic by inserting a 2' section of cast iron pipe. If the transiton from ABS to PVC is above ground then a mission band must be used. If the transition is below ground a "Fernco" fitting is allowed if encapsulated in concrete thus preventing/eliminating the fatique on the rubber portion of the fitting.
Larry Pepin
Building Official
City of Columbia Heights
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Re: Plumbing Inspection

Postby FW » Mon Aug 16, 2010 8:07 am

Larry Pepin wrote:If the transition is below ground a "Fernco" fitting is allowed if encapsulated in concrete thus preventing/eliminating the fatique on the rubber portion of the fitting.

Larry,
Can you direct me to where the concrete is required? I don't see it in the code or in the manufacturers installation instructions. :oops:
Thanks
FW
 

Re: Plumbing Inspection

Postby JimW » Mon Aug 16, 2010 8:44 am

Question #1 - Yes

Question #2 - I agree with Larry P on. I am not sure where is says it has to be concrete, but Brad D the old plumbing inspector in SLP drove it into my head. All the main sewer repairs that I inspect are done that way with out me saying anything.
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Re: Plumbing Inspection

Postby Jeff Keogh » Mon Aug 30, 2010 10:44 am

Never heard of the "encased in concrete" but this still applies.

Subp. 6. Transition couplings. A transition
coupling is one which is to be used when pipes
made of different materials are to be joined. A
transition coupling may be made of elastomeric
materials (ASTM C 425 and ASTM C 564) and
300 series stainless steel bands and bolts, except
that an exterior corrosion-resistant shield to
prevent outward expansion of the coupling must
be included on above-ground installations. Any
transition coupling joining plastic to plastic,
copper to copper, or galvanized to galvanized,
must be approved by the administrative
authority.
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