When should I use an anti-syphon or resealing trap?

Generally, the waste pipe or discharge pipe from an appliance is beyond the limitations of an unvented waste pipe. Usually more critical on the basin and bidet Wastes.

What is the difference between an anti-syphon trap and a re-sealing trap?

A re-sealing is designed to allow air to pass through the water seal under negative pressure but will retain sufficient water. An anti siphon trap has a small mechanical valve which opens under negative pressure.

Why does water not run away in my shower?

If it is not due to the obvious reason of a blockage caused by a buildup of debris, the problem could be due to back pressure within the discharge pipe.

What is the maximum thickness of bath that your bath fillers can be installed on?

The maximum thickness of the bath is 20mm and unfortunately, we do not make an extension ferrule to extend that length.

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Description

🖤 Connect with confidence — the sleek seal your plumbing deserves!

SLEEK BLACK DESIGN - Modern black finish blends effortlessly into professional plumbing setups.
TIME SAVING INSTALLATION - Outperforms flexible couplings and time savers for quick, reliable pipe transitions.
DURABLE FINNED SEAL SPIGOT - Ensures leak-proof, low-level drainage connections with a robust internal grip.
PRECISION FIT FOR 4 PIPES - Seamlessly connects to 4"/110mm cast iron, plastic, or clay pipes with BS 4514 O' seal socket.
TRUSTED QUALITY WITH 4 6 ⭐ RATING - Highly rated by professionals for durability and ease of use since 2012.

The McAlpine DC1-BL Drain Connector is a high-quality black drain fitting designed for low-level connections. It features a finned seal spigot for secure internal connection to 4"/110mm cast iron, plastic, or clay pipes, with an O' seal socket compliant with BS 4514 standards. Lightweight and durable, it offers a professional-grade, leak-resistant solution favored by plumbers and DIYers alike.

Specifications

ASIN	B005CTSJC0
Batteries Required?	No
Batteries included?	No
Best Sellers Rank	218,042 in DIY & Tools ( See Top 100 in DIY & Tools ) 574 in Water Heaters & Parts
Colour	Black
Customer Reviews	4.6 4.6 out of 5 stars (97)
Date First Available	8 Oct. 2012
Included Components	trap; fittings;
Item Package Quantity	1
Item Weight	200 g
Item model number	DC1-BL
Manufacturer	McAlpine
Measurement System	Metric
Number of Pieces	1
Part Number	DC1-BL
Product Dimensions	19 x 13 x 20 cm; 200 g

Reviews

D**D

Really well made

Well made

23.04.2025

R**.

Cast to pvc does the trick

Fits into cast soil stack down pipe with ease and allows to change to pvc Much better than flexible coupling or time savers

2.11.2025

G**A

Did the job well.

Siliconed it in place on a hot day as it was a bit softer than expected, so belt and braces! Held fast 3 months on✅

31.08.2025

M**S

does what its made for

connected cast to plastic drain

2.03.2025

D**L

Clayware to plastic by a trusted brand.

Does what it says, perf CT leak free fit.

1.10.2024

J**N

Quick and easy

Just what I needed, easy to use.

13.10.2023

D**K

Fantastic product and the best seller

Just as described. High quality. Highly recommended.

15.05.2020

A**Y

Did the job

Excellent fit from clay to plastic

16.07.2019

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TrustScore 4.5 | 7,300+ reviews

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