UPVC Pipes & Fittings

Step 1: Planning the Layout

Plan the entire piping arrangement thoroughly before any work starts. Determine inlet and outlet locations, equipment locations (such as pumps or storage tanks), and locations of fittings like bends, tees, and couplers.

• Plan to have as few joints as possible and as high a flow efficiency as possible.
• Ensure building codes and pressure ratings are met.
• Include pipe support points and future maintenance access in the planning.

Step 2: Cutting the Pipe

• Cut the UPVC pipe with a fine-tooth saw or pipe cutter for a neat, square cut (90° angle). Refrain from angled or jagged edges since they weaken joint sealing.
• Hold with a pipe vise or a firm support to avoid cracking during cutting.
• Always wear protective safety gloves and goggles.

Step 3: Deburring and Chamfering

Deburr the inside and outside edges of the cut pipe using a file or deburring tool. Chamfer the outside edge of the pipe at a 10°–15° angle for easier insertion into fittings. Reduces insertion force and aids stronger bonding.

Step 4: Dry Fitting (Trial Assembly)

Install all pipe sections without cement to ensure alignment and orientation. Pencil mark joints to provide reference for final positioning when applying solvent cement. This step ensures fewer mistakes and correct joint alignment.

Step 5: Surface Cleaning

Clean the pipe end and fitting socket with a dry, clean cloth to wipe off dust, oil, or dirt. As an added measure of cleanliness, a UPVC-approved cleaner may be applied. Do not use corrosive chemicals that destroy UPVC material.

Step 6: Solvent Cement Application

Utilize only Dulet-approved UPVC solvent cement. Apply a thin coat to the outside of the pipe and a heavier coat inside the fitting.

• Apply with a brush for uniform application.
• Do not let the cement dry up before assembly.

Step 7: Fitting the Joint

Push the pipe directly into the fitting using a gentle twisting motion. Press until it just touches the bottom of the socket, and hold for 30 seconds to ensure the bond is secure. Clean off any excess cement and don’t touch the joint.

Step 8: Curing and Setting Time

Let the joint set for a minimum of 15 minutes at room temperature before moving. For pressure systems, wait 24 hours before testing. In cold environments, adjust curing time accordingly.

Step 9: Pipe Support and Alignment

Support horizontal pipes with brackets every:

½” to 1″: every 3 feet

1½” to 2″: every 4 feet

• Vertical pipes: support every 6 feet or per floor
• Avoid tight clamps or over-bending the pipe to minimize stress on joints.

Step 10: Pressure Testing

Test the system with clean water after it has fully cured at 1.5 times working pressure. Check for leaks for 2 hours. Avoid using air pressure if possible — water is safer and normal for UPVC.

Step 11: Insulation and Protection

Use UV-resistant paint or wrap to cover when installed outdoors to shield from sunlight. Insulate pipes in cold climates to avoid heat loss or freezing. Don’t embed solvent joints in concrete. Make use of sleeves or access panels if necessary.