CLEANOUT SIZE IS RELATED TO PIPE SIZE 1 12 AND 2 IN DIAMETER PIPE HAVE A 1 12

Cleanout size is related to pipe size 1 12 and 2 in

This preview shows page 24 - 32 out of 40 pages.

CLEANOUT SIZE IS RELATED TO PIPE SIZE: 1 1⁄2 AND 2 IN DIAMETER PIPE HAVE A 1 1⁄2 IN CLEANOUT; 2 1⁄2 AND 3 IN DIAMETER PIPE HAVE A 2 1⁄2 IN CLEANOUT; AND 4 IN DIAMETER AND LARGER PIPE HAVE A 3 1⁄2 IN CLEANOUT.
Image of page 24
VENTS VENTS ARE PIPES THAT INTRODUCE SUFFICIENT AIR INTO THE DRAINAGE SYSTEM TO REDUCE AIR TURBULENCE (FROM SIPHONING OR BACK PRESSURE) AND TO RELEASE SEWER GASES TO THE OUTSIDE. THE PRIME PURPOSE OF VENTING IS TO PROTECT THE TRAP SEAL. IF TRAPS DID NOT EXIST IN A DRAINAGE SYSTEM, A VENTING COULD BE ELIMINATED. WITHOUT A VENT, AS WATER DRAINS FROM A FIXTURE, THE MOVING WASTEWATER TENDS TO SIPHON WATER FROM THE TRAP OF ANOTHER FIXTURE AS IT FALLS THROUGH THE DRAIN PIPES. AS A RESULT, VENTS MUST SERVE THE VARIOUS FIXTURES, OR GROUPS OF FIXTURES, AS WELL AS THE REST OF THE DRAINAGE SYSTEM.
Image of page 25
VENTS VENT PIPING MAY BE COPPER, PLASTIC, CAST IRON, OR STEEL. Types of venting methods are as follows. 1. INDIVIDUAL VENTS 2. COMMON VENTS 3. WET VENTS 4. CIRCUIT VENTS 5. COMBINATION DRAIN AND VENT 6. RELIEF VENT
Image of page 26
VENTING INDIVIDUAL VENTS THE INDIVIDUAL VENTING TECHNIQUE IS DEFINED AS THE INSTALLATION OF A VENT PIPE FOR EVERY TRAP OR TRAPPED FIXTURE. IT IS THE EASIEST METHOD OF ENSURING THE PRESERVATION OF A TRAP SEAL BUT THE MOST COSTLY BECAUSE OF THE NUMBER OF VENT PIPES REQUIRED IN THE VENTING SYSTEM. AN INDIVIDUAL VENT MUST BE LOCATED IN CLOSE PROXIMITY TO THE TRAP TO PROPERLY VENT IT.
Image of page 27
VENTING COMMON VENTS THE COMMON VENTING METHOD SERVES TWO FIXTURES LOCATED ON THE SAME FLOOR; IT IS ESSENTIALLY AN INDIVIDUAL VENT THAT SERVES NO MORE THAN TWO TRAPS OR TRAPPED FIXTURES . THIS TYPE OF VENT MUST BE LOCATED CLOSE TO THE TRAPS IT VENTS TO PROPERLY VENT IT. WHEN THE FIXTURE CONNECTS AT DIFFERENT LEVELS, THE DRAINAGE PIPE BETWEEN THE TWO TRAPS MUST BE INCREASED TO COMPENSATE FOR THE COMBINED WATER AND AIRFLOW.
Image of page 28
VENTING WET VENTS THE WET VENTING METHOD USES A SINGLE VENT PIPE TO PROVIDE VENTING FOR ALL OF THE FIXTURES OF ONE OR TWO BATHROOM GROUPS (E.G., A WATER CLOSET, LAVATORY, SHOWER, BATHTUB, AND BIDET) THAT ARE LOCATED ON THE SAME FLOOR. THE VENT PIPE FOR THE LAVATORY TYPICALLY SERVES AS THE VENT FOR THE OTHER FIXTURES IN THE BATHROOM. PLUMBING CODES USED TO REQUIRE THE WATER CLOSET TO BE THE LAST FIXTURE IN LINE ON A WET VENT SYSTEM. HOWEVER, RECENT TESTS PROVIDED EVIDENCE THAT THE ORDER OF THE FIXTURES DOES NOT INFLUENCE THE OVERALL PERFORMANCE OF THE WET VENT SYSTEM.
Image of page 29
VENTING CIRCUIT VENTS A CIRCUIT VENTING SYSTEM IS A HORIZONTAL VENTING PIPE SERVING UP TO EIGHT FIXTURES. EACH FIXTURE MUST BE CONNECTED TO A SINGLE HORIZONTAL DRAIN IN THIS TECHNIQUE. IN THIS SYSTEM, ALL OF CONNECTIONS AND THE MAIN PIPING MUST REMAIN IN THE HORIZONTAL ORIENTATION. VERTICAL DROPS ARE GENERALLY NOT PERMITTED.
Image of page 30
VENTING COMBINATION DRAIN AND VENT A COMBINATION DRAIN AND VENT SYSTEM ALLOWS THE DISTANCE FROM TRAP TO VENT TO BE EXTENDED INFINITELY, PROVIDED THE DRAIN STAYS IN THE HORIZONTAL ORIENTATION AND THERE IS A VENT SOMEWHERE WITHIN THE HORIZONTAL BRANCH.
Image of page 31
Image of page 32

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture