Mazco Products & Services Ltd.: ¾" Service Tee Connection (Generation 1 Tool)

Usage instructions on ¾" service tee connections (Generation 1 Tool)

Preparation and Pre-Fitting

1. Prepare service tee by removing all protective wrapping from the upright and lateral branch portions of the service tee. Clean surface to bare metal finish between threaded cap and lateral branch.

2. Before mounting the Safe-T-Stopper®, ensure the cap removal adapter fits properly over the service tee cap (Fig. 1). The adapter should bottom out on the cap with good magnetic attachment strength. tool has been mounted above the service tee branch and secured in place, a 1/4" turn ball valve allows for pressure containment and release as well as providing the attachment for the cap/plug removal tool and the expandable plug setting tool. Once the expandable plug has been set in place, the tee connection can be cut off and completion plug installed, or the service tee connection can be returned to service by removing the expandable plug and reinstalling the threaded connection cap or plug.

Prepration and Pre-Fitting the Safe-T-Stop for Natural Gas
Fig. 1

Mounting the Safe-T-Stopper^®

Fig. 2

1. Take a firm two-handed grip on one packing seal at a time and stretch over the service tee cap. The first packing seal must be installed with the bevel facing downward (Fig. 2). The second packing seal must be installed with the bevel facing upward. When both packing seals are over the cap, pull both seals up under the cap (Fig. 3).

NOTE: The packing seals can also be used slit on one side for easier placement over the cap but it is more difficult to place the tool over afterwards.

2. Using a pipe wrench, loosen the service tee cap until cap is hand-tight.

NOTE: Do not loosen too much as the cap could become disengaged from threads. The cap removal tool is not designed to break the cap loose.

3. Place the two packing retainer half-collars under the packing seals with the bevelled edges upward and the collar cutaway over the service tee branch (Fig. 3).

Fig .3

Fig. 4

4. Place the packing retainer and cap housing (with or without valve) over the packing retainers, aligning the two packing retainer bolts through the packing retainer half-collars (Fig. 4).

NOTE: Be sure to fit the ¾ " adapter flange inside the housing with flange facing downward before mounting tool .

5. Place safety restraining strap assembly over one packing retaining bolt and install packing retainer nut hand-tight. Loop restraining strap under main line and connect other end of restraining strap assembly to the second packing retainer bolt. Place packing retainer nut on bolt and hand-tighten (Fig. 4).

6. Using a 9/16" wrench, slowly tighten packing retainer nuts evenly while ensuring the packing retainers are moving upwards into retainer housing. Be sure to keep entire tool raised up under service tee cap.

Tighten packing retainer nuts until the tool is secure on the service tee. Do not over-tighten.

7. Check to ensure the service tee cap is centered inside the retainer and cap housing. The tool should be straight upward when mounted correctly on the service tee.

8. Thread ball valve onto retainer and cap housing if not already secured. Ball valve handle should be in upward position and bleeder valve on upper side of ball valve. Hand-tight is sufficient—do not use wrenches. Valve can be left in open position (Fig. 5).

Fig. 5

Removing Threaded Cap

Fig. 6

CAUTION: If at any point during these procedures there is any apparent release of gas or other product stop the procedure immediately, and take corrective action.

1. Thread cap removal tool onto ball valve (Fig. 6). Hand-tight is sufficient. Do not use wrenches.

NOTE: Apply a light film of grease to the tool shaft to assist in shaft movement.

2. Close 1/8" bleeder valve on the upper side of the ball valve.
3. Lower cap removal tool onto cap and engage the slotted tool with the two raised castings of the cap.

4. Rotate tool counter-clockwise to remove the cap. Be sure to press down firmly while turning to ensure the tool does not hydraulic away from the cap. A slight ratchet effect will be felt and heard once the cap threads are disengaged from the service tee threads.

5. Slowly raise the cap removal tool until completely up and out of the valve (Fig. 7).

6. Close ball valve and open 1/8" bleeder valve until pressure is completely released (Fig. 7).

7. Remove cap removal tool.

NOTE: Once cap has been removed, DO NOT leave tool unattended. Place the lock-out plug on to tool if unattended. Follow company lock-out procedures

Fig. 7

Inserting the Expandable Plug

Fig. 8

1. Install the plug setting tool extention drive onto the expandable plug tool shaft (Fig. 8). Extention drive locating pin should be on the right side notch when looking down the shaft for installing the expandable plug. Secure the extention drive in place by tightening the set screw.

2. Place the expandable plug onto the expandable plug tool shaft extention in the tighten position. (Right side while looking down tool shaft.) Be sure the expandable plug is completely relaxed to ensure a loose fit inside of service tee.

3. Mount tool housing extention onto the top of the ball valve (Fig. 9).

Fig.9

4. Before mounting expandable plug setting tool into tool housing extention, place tool along side of valve to get a distance measurement from the bottom of the expandable plug to the top of the expandable plug tool housing. This will ensure the expandable plug is located just above the main line and far enough below the service tee branch. Slide marking indicator down shaft to top of brass housing.

5. Thread expandable plug setting tool onto the top of the tool housing extention (Fig. 10). Hand-tighten is sufficient. Do not use wrenches.

NOTE: Apply a light film of grease to the tool shaft and spring loaded inner drive shaft at the top of expandable plug setting tool to assist in shaft movement.

6. Close 1/8" bleeder valve on ball valve.

7. Open ball valve.

8. Slowly lower expandable plug down into service tee until the plug contacts the main or the pre-measured depth in step 4 of the 'Inserting the Expandable Plug' Section.

9. Turn expandable plug tool handle clockwise while holding the tool shaft, until tight.

9. Turn expandable plug tool handle clockwise while holding the tool shaft, until tight.

10. Press expandable plug tool shaft down slightly while turning tool shaft clockwise approximately ¼" to disengage from expandable plug.

11. Raise expandable plug setting tool shaft completely upward.

12. Open service line riser valve and vent service line to a safe location.

13. Once pressure is released, open small bleeder valve on ball valve to confirm all pressure has been released from tool.

14. Remove Safe-T-Stopper^® tool if the service tee is to be removed. Do not remove Safe-T-Stopper^® tool if service tee is to be put back in service.

Fig. 11

NOTE: If cap or expandable plug were ever to become disengaged from tool, attach magnet retrieval tool to the expandable plug setting tool to retrieve disengaged item (Figure 11).

To Remove Service Tee

1. Measure distance from top of service tee to the top of the expandable plug.

2. Mark service tee cut-off location approximately 5 mm above the top of the threaded screw in the center of the expandable plug.

3. Using a pipe cutter, or other tools approved by your company standards, cut off service tee.

4. Place properly sized tapered plug into the service tee stub above the expandable plug (Fig. 12). Be sure of correct fit due to different service tee wall thicknesses (Sch 40, Sch 80, etc.) .

5. Once correct tapered plug is set in place, tap the plug in place with a hammer and backweld entire plug circumference onto service tee stub.