First installation of the BullDog

1
Case History City of McKinney, Texas

• First installation of the BullDog PVC
  pipe-to-pipe restraint system occurred on August,
  2006.
• Eliminated need for concrete thrust blocking

2
Case History City of McKinney, Texas
The first Bulldog project was part of the Citys
Annual Maintenance Program to Replace
Substandard Water and Sewer Mains. This
project was prioritized because of red water
complaints and because the Citys Paving
Department was preparing to pave the street.
3
Case History City of McKinney, Texas
Designed new 1,110 feet of 8 PVC water pipeline
offset from existing main. The pipe was DR18,
C900. Joint restraint was needed at reducers,
bends, and valves.
4
Case History City of McKinney, Texas
New PVC water line paralleled the existing main.
45-degree offsets used instead of 90-degree bends
because the smaller angle generates less thrust
force.
5
Case History City of McKinney, Texas
Using the Bulldog System resulted in

• Successful installations
• Less installation time compared to the
  traditional method
• No wait for concrete to cure
• No concrete mess or expense
• Backfilled and ready for pavement repairs by the
  end of the day

6
City of McKinney, Texas Fabricated Fittings

• Installation of BullDog PVC fabricated pressure
  fittings in April, 2007.
• Project connected new pipe line to existing
  pipeline.

7
City of McKinney, Texas Fabricated Fittings

• PVC fabricated fittings are more easily handled
  than traditional iron fittings.

8
City of McKinney, Texas Fabricated Fittings

• New water line alignment shown at the top of the
  photo. Existing water line alignment shown at
  the bottom of the photo.

9
City of McKinney, Texas Fabricated Fittings

• Tying into the existing line.