Skills Canada National Competition Project - Specifications

15- Plumbing / Post-Secondary June 4-7, 2014 - Toronto

 

 

  SCNC 2014 – Project 15 – Plumbing

Page 2

 The measurements shown in this drawing may be modified at the competition.

1. The competition consists of a plumbing rough in for the installation of a toilet, a

washbasin and a bathtub. All the piping will be mounted against a Unistrut steel frame structure. This Unistrut structure will be erected onto the competition platform by the National Technical Committee (hereafter called the NTC) before the competition and shall remain in that location. A drawing of this structure is attached to this document.

2. All the piping and supports must conform to the National Plumbing Code (2010)

(hereafter called the NPC) and the project shall be done using the least amount of fittings possible. Uneconomical use of fittings will be penalized. For example, if the competitor makes a 90° elbow, below the toilet floor flange using two 45° elbows, the best plumbing practice (for best syphonage) would have been to use a 90° elbow.

3. The competition will be divided in 3 parts:

First: The competitor must do an isometric sketch (hereafter called a sketch)

including all the hot and cold copper water pipes and all the DWV PVC drainage pipe required to complete this rough-in. The quality of the sketch will not be assessed. However, this sketch must represent exactly all the piping pieces and their directions. Each difference between the sketch and the project will be penalized. For example, a copper tee branch going up in the sketch and going down in the installation. Please note that this is not a scaled sketch or is it required to show slope in the sketch.

Second: The competitor must do an exact material list referring to the material available

on the competition site. This material list will be provided on the material take-off sheet provided by the NTC. At the evaluation, this material list will be compared to the installation and all differences from this list will either have a penalty or a bonus applied. Whether extra fittings and pipe used or less fittings and pipe used than what was requested on the material list. If the competitor replaces a fitting by installing one of the example bends using a mechanical bender, the competitor will obtain extra points as bonus. In this case, the fittings replaced by the bend will not be a penalty. A drawing showing the different examples of bends is included.

Third: In the project drawing supplied by the NTC, the competitor will find the exact

positions of a toilet, a wash basin, bathtub, PVC 80 (3") stack and the hot and cold water risers. The drawing provided by the NTC does not include all the DWV PVC piping required. The competitor must install all the piping needed, reflecting exactly their sketch and the project drawing. The CU 20 (¾") hot and cold risers and the PVC 80 (3") stack shown will be installed by the competitor.

 

  SCNC 2014 – Project 15 – Plumbing

Page 3

4. The metric system is applied for all measurements with a tolerance of 2mm to obtain all

points. All measurements are in millimeters.

5. All the hot water copper pipe joints will be silver brazed (silver alloy). All the cold water copper pipe joints will be soft soldered (no lead alloy) The ¾" copper risers will have caps installed at either end to allow for testing (note the joint specified) and two ¾" x ¾" x ½" tees. The drainage PVC pipe joints will be glued with IPEX System 15 glue. The bathtub hot and cold water outlets must be joined together, allow for two ½" copper 90° elbows. This will allow for a pressure test on both water lines at the same time. Also allow for a ½" copper x ½" female iron pipe adapter which must be soldered on the toilet water supply outlet to connect the air test assembly, which will be supplied by the NTC. These two allowances and the test assembly will be noted on the material list supplied to the competitor on competition day.

6. The water lines for this competition include one cross over and five points for rough in.

If the competitor uses a mechanical bender to make the bends for the cross over or for the rough in as shown in the example of different bends a fitting saving occurs and bonus points are awarded. For maximum bonus points be aware of the dimensions shown for minimum distance. A bend made with a mechanical bender has a different minimum distance than a bend using a soldered fitting. As shown on the examples of different bends. The competitor will be provided with a Ridgid 310 5/8" bender to make all mechanical bends. This bender has a 56 mm radius.

7. The slope of the PVC drainage pipes must be the minimum slope required by the NPC.

All copper pipes must be level or plumb. All vertical PVC pipes must be plumb.

8. Copper pipes shall be attached to the Unistrut structure with the copper pipe clamps specified. PVC pipes shall be attached to the Unistrut structure using pipe clamps as specified. Also, PVC pipes can supported from the floor use a split ring hangar, rod and a ceiling flange. (See pictures at the end of this document)

9. Copper pipes will be tested by air pressure: 350KPA or 50 PSI for 2 minutes.

10. No sanding / polishing on copper piping are allowed after soldering or brazing joints

completed. A wash with clean water only is allowed. 11. The competitor must install and remove the air testing assembly.

The request for an air test is to happen during competition time but the test made by judges can take place after the competition has officially timed out. Competitor cannot make a preliminary air test before the pressure test made by judges.

 

  SCNC 2014 – Project 15 – Plumbing

Page 4

12. Each request for extra material will be penalized. Each difference between the material list and the installation will be assessed. Each difference between the sketch supplied by the competitor and the completed project will be assessed. An approved bend will have a bonus per fitting assessed with no penalty assessed for each fitting replaced and saved.

13. The execution time will be considered to break a tie situation.

14. Safety rules will be applied and assessed during all the competition.

Supports used at the competition