Thanks for the reply.Tub drain is off how much, and which way?
Blue-lined wet vent pipe from lav is OK at 10 ft, but should keep the 1/4 inch per foot slope. I don't know if there is a length limit. I think steeper would be OK too.
Normally there is a built in angle to the fittings.
I wouldn't worry if it's only 12".
This thread is getting old and too hard to look back on. You might want to post a diagram and ask your venting question. From the sound of it you may not be vented correctly.
Seems like a shame to get rid of a high-cost high-status durable slate roof.''
Vent 1: This is the original vent that vented everything (incorrectly I am sure). Now it will basically vent the toilet. If I keep it it will be a 3" pvc pipe off the top of the waste stack. Maybe 6' of pipe before it goes through the roof.
Vent 2: This is a 2" pipe that starts in the basement for the washer and laundry sink. It then comes through the kitchen and picks up the kitchen sink, then continues on to pick up the vent for the tub/shower and lav. The 2" will go into the attic, then I will upsize to 3" to go out the roof.
"The developed length of individual, branch, circuit, and relief vents shall be measured from
the farthest point of vent connection to the drainage system to the point of connection to
the vent stack, stack vent, or termination outside of the building." (page 4)
903.1 Roof extension.
Open vent pipes that extend through a roof shall be terminated not less than [NUMBER] inches (mm) above the roof. Where a roof is to be used for assembly or as a promenade, observation deck, sunbathing deck or similar purposes, open vent pipes shall terminate not less than 7 feet (2134 mm) above the roof.
903.2 Frost closure.
Where the 97.5-percent value for outdoor design temperature is 0°F (-18°C) or less, vent extensions through a roof or wall shall be not less than 3 inches (76 mm) in diameter. Any increase in the size of the vent shall be made not less than 1 foot (305 mm) inside the thermal envelope of the building.
Thanks. Let me review the vent brochure.. https://www.energystar.gov/ia/partners/bldrs_lenders_raters/downloads/County Level Design Temperature Reference Guide - 2015-06-24.pdf page "83" thru "85 shows 99% PA design temperatures for PA, and I think 99% is colder than the 97.5% number.
Jeff,There is no answer you connect the 2 pipes with one vent . or run seperate 2 vents out roof. Best is only one vent out roof . with no concideration for cost of labor or material. a single penetration is better how much better perhaps negligeable but its better. Ive never been to pennsylvania if it dosent snow id put vent 8 inches high if it does snow consult locals
This is awkward, but...
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