Home improvement plumbing accessory that creates a secure join between 110mm soil stacks and 1.5-inch solvent-weld waste. For straightforward repairs and reliable waste routing, Primaflow Big Boss Soil Pipe Adaptor gives confidence at the job site. Is this the right adaptor for your existing soil and waste pipes?
⚡ At a Glance
- • Cut-out Size: Requires a 44mm hole in the soil pipe for the boss to be inserted
- • Best for: Plumbers and competent DIYers connecting 1.5-inch solvent-weld waste to 110mm soil stacks
- • Not ideal for: Applications needing 40mm push-fit connections or non-solvent bonding methods
Solvent-weld boss designed to join 1.5-inch solvent-weld waste pipe to a 110mm soil stack. Installation requires a 44mm cut-out and bonding with solvent-weld cement.
Secure, permanent join – With solvent-weld boss sized for 1.5-inch waste
Cut a 44mm hole in the soil pipe, clean mating surfaces, insert the boss and secure using solvent-weld cement as instructed. The connection relies on solvent welding to form a bonded joint between plastic surfaces.
A correctly prepared and solvent-welded joint produces a stable, leak-resistant waste connection suitable for standard soil stack work.
Quick repair workflow – Thanks to a single-piece boss and simple preparation steps
The boss is designed for insertion once the hole is cut and surfaces cleaned, requiring only the solvent-weld bonding stage to complete installation. No additional mechanical fixings are specified.
Familiar solvent-weld technique keeps installation straightforward, so small repairs or replacements can be completed quickly with common plumbing materials.
Clear compatibility boundaries – With explicit exclusion of 40mm push-fit systems
Manufacturer guidance states the boss is not suitable for connecting 40mm push-fit waste pipe to the soil pipe, limiting use to solvent-weld waste systems of the specified size.
Avoids mismatch problems by making compatibility requirements explicit, helping installers choose the correct adaptor for solvent-weld systems.
✨ The 4 Key Reasons for Primaflow Big Boss Soil Pipe Adaptor
- User-validated fit – Customers report consistent, accurate sizing for reliable joins
- Single-unit pack – Supplies one boss, ideal for single repairs or replacements
- Solvent-weld ready – Designed for bonding with common solvent-weld cement for permanence
- Straight insertion form – Simple shape speeds up installation after hole preparation
📋 Technical Details at a Glance
- Category: Home Improvement, Plumbing
- Brand: Primaflow
- Model: Big Boss Soil Pipe Adaptor
- Compatibility: 110mm soil pipe to 1.5-inch solvent-weld waste pipe
- Cut-out Size: 44mm hole required in soil pipe
❓ Frequently Asked Questions
Q: What size hole do I need to cut in the soil pipe?
A: A 44mm hole is required so the boss can be inserted into the soil pipe.
Q: Can this adaptor connect 40mm push-fit waste pipe?
A: No, the adaptor is not suitable for connecting 40mm push-fit waste pipe to the soil pipe.
Q: How is the boss secured after insertion?
A: Clean the mating surfaces, insert the boss into the cut-out and secure it using solvent-weld cement.
🏆 Our Verdict
The Primaflow Big Boss Soil Pipe Adaptor suits plumbers and competent DIYers who need a solvent-weld connection between 110mm soil stacks and 1.5-inch waste. Clear installation steps — cut a 44mm hole, clean surfaces and solvent-weld — make it a practical choice for single repairs. A correctly bonded joint delivers a long-lasting, reliable waste connection.
