Archive for the ‘Plumbing Designs’ Category

Lets take a look at the isometric drawing of a “Special Vent System” plumbing installation!

What is an Isometric Drawing ?

What we have here is a rough in plumbing diagram of a Special plumbing Venting System. One of the typical venting lay out for island type kitchen sinks. Under the regulations of the Uniform Plumbing Code island venting (special vent system) will be acceptable.

For the Rough in of the Island Kitchen sink to work properly, and pass inspection all traps must be installed above the finish floor. The vent will need to extend as high as it can under the cabinet and/or drainboard, then return back down to connect to the horizontal waste pipe immediately downstream from the vertical plumbing waste pipe.

The return vent must be connected through a wye branch fitting. In addition to the connection through a wye-branch fitting there must be a foot vent installed. The foot vent will need to be taken off the vertical fixture vent by means of a wye-branch drainage fitting immediately below the floor and extending to the nearest wall partition. Then through the roof to open air, this vent may tie in to other vents at a point of 6″ above the highest fixture flood level rim served.

NOTE: All fittings below the floor must be Plumbing drainage fittings only.

The foot vent will need to have a 2% slope per foot back to the drain. The Return portion of the vent will need to be comprised of (1) piece fitting or an assembly of a 45 degree (1/8″ bend), a ninety degree (1/4″ bend) and a 45 degree (1/8″ bend) elbow in that specific order.The Plumbing diagram shows the correct UPC pipe sizes. (refer to rough in plumbing diagram)

The island sink drain, upstream of the returned vent, shall serve no other fixtures. An accessible cleanout will need to be installed in the vertical portion of the foot vent (see rough in plumbing diagram for location)

There is a spot for an optional cleanout on the return vent. The reason for this would be to make sure that if there is a draining issue and everything on the waste was checked that possibly there may be an obstruction in the wye branch for the vent and this cleanout would be perfect to camera and/or snake out. Remember that this is optional, it is noted on the rough in plumbing diagram.

Always check with your local plumbing inspector, plumbing official or the plumbing administrative authority before attempting a rough in plumbing diagram to make sure that you have the right tools to get the job done the first time!

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This is an isometrical drawing of standard bathroom plumbing installation!
An isometric plumbing diagram is a 3D view of the entire plumbing system, Drain, Waste and Vent system (DWV). Piping, connecters, fixture trap and sizes would be the only thing seeable. Let's focus primarily on

What is an isometric line Drawing ?

An isometric plumbing diagram is a 3D view of the entire plumbing system, Drain, Waste and Vent system (DWV). Piping, connecters, fixture trap and sizes would be the only thing seeable. Let’s focus primarily on “A Basic Rough in Plumbing Diagram” (Bathymetry Isometric Drawing).

A plumbing diagram is a very useful tool that can preserve you lots of money and worries. The drawing puts across to the plumbing inspector that your arrangement will conform to the minimum standards of the Uniform Plumbing Code. By having an three-dimensional drawing of your new plumbing installation, an inspector can analyze your rough-in plumbing diagram making a point the correct pipe sizes and correct fittings are utilized to complete the plumbing task.

The Plumbing diagram should be of only the “NEW” plumbing that is to be put in. If you are installing a new bathroom, reconstructing a bathroom or adding a fixture to the bathroom then only the bathroom isometric diagram will be needed.

The plot will have to include a bathroom plumbing ventilation diagram. Vent pipes on plumbing diagrams are typically drawn as dashed lines. This portion of the plumbing diagram will show how and where your vent pipe ties in to an existing vent pipe or exits the roof as an individual vent. Make sure that the vent’s cross-sectional area is the equivalent as the cross sectional area of the waste outlet. The aggregate croos-sectional area can’t be lower than the largest required bulding sewer in size.

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Exceptional plumbing system venting….

What we have here is a rough in plumbing diagram of a specialised plumbing ventilating System. This makes up the typical venting for island type kitchen sinks. Under the ordinances of the Unform Plumbing Code this type of ventilating excercises will be accepted.

Roughing in of the Island Kitchen sink to work properly, and pass jurisdictional inspection all traps must be put in above the finish floor. The vent will be required to extend as high as it can under the cabinet and/or drainboard, then come back down to connect to the horizontal drainpipe immediately downstream from the vertical plumbing system drainpipe.

The return vent must be connected through a wye branch fitting. Likewise the connection through a wye-branch fitting must have a foot vent installed. The footvent will need to be deducted off the vertical fixture vent by means of a wye-branch drainage fitting directly below the floor and reaching the nearest wall partition. Then through the roof to open air, this vent may connect to other vents at a point of 6″ above the highest fixture flood level rim served.

The foot vent will need to have a 2% slope per metrical foot back to the drainpipe. The Return portion of the vent outlet will need to be comprised of (1) piece fitting or an assembly of a 45 degree (1/8″ bend), a ninety degree (1/4″ bend) and a 45 degree (1/8″ bend) elbow in this specific order.

The island sink drainpipe, upstream of the returned vent, shall service no other fixtures. An accessible cleanout will need to be established in the perpendicular portion of the foot vent.

There’s a point for an optional cleanout on the return vent. The reason would be to make certain that if there is a draining issue and everything on the waste was checked that possibly there could be an obstruction in the wye branch for the vent and this cleanout would be perfect to camera and/or snake out. Think of this as optional, and not regulatory, just good practice.

NOTE: All fittings beneath the floor must be Plumbing drainage fittings solely.

CKP Plumbing – Hawaii Plumbing Contractor
“We Measure Twice + Cut Once”
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