16 20 25 32-110mm PVC Fittings Aquarium Pool Verrohrung Rohr Winkel Muffe T-St

Match the fitting size to the outer diameter (OD) of your pipe, not the inner diameter. For example, a "20 mm" socket accepts pipe with a 20 mm OD. For threaded variants, match the BSP thread size (e.g., ½", ¾", 1") to the thread on your pump port or valve. If you are unsure, measure your existing pipe OD with calipers before ordering.

Yes. PVC is chemically inert and non-toxic once fully cured, making it widely used in aquarium sump plumbing, koi pond filter circuits, and reef tank return lines. Ensure solvent cement is fully cured (typically 24 hours at room temperature) before introducing water to the system. The white and blue colour options are particularly popular for visible aquarium builds.

Solvent-weld (klebemuffe / Muffe) sockets create a permanent chemical bond with PVC pipe using solvent cement — the joint becomes as strong as the pipe itself and is not intended to be disassembled. Threaded fittings (IG = Innengewinde / female thread; AG = Außengewinde / male thread) can be assembled and disassembled with PTFE tape and are used where future servicing is needed, such as at pump connections or filter inlets.

These fittings are designed for standard PVC pipe. CPVC pipe has a slightly different OD in some schedules and requires CPVC-rated solvent cement — compatibility is not guaranteed. ABS pipe uses a different solvent cement chemistry. For threaded connections, the BSP thread standard is compatible regardless of pipe material, provided the thread size matches.

Use a PVC solvent cement rated for the pipe schedule and application (e.g., low-VOC aquarium-safe cement for fish-keeping use). Apply primer first on larger diameters (32 mm and above) for a stronger bond. Initial set typically takes 15–30 minutes; full cure for pressure testing is generally 24 hours at 20 °C. Follow the cement manufacturer's instructions for your specific ambient temperature and pipe size.

Yes. The brass-insert variants (Messinggewinde) use BSP parallel threads, which are the most common thread standard on European and UK pumps, valves, and filter heads. Wrap the male thread with 2–3 layers of PTFE tape before assembly to ensure a watertight seal. Do not overtighten — hand-tight plus approximately one full turn with a wrench is sufficient for BSP parallel threads.

Choose the diameter to match your pipe OD (20 mm, 25 mm, 32 mm, or 40 mm). For length, measure the distance between the two rigid pipe ends with a small allowance for the natural curve of the hose — typically add 10–15% to the straight-line distance. The 304 stainless hose clamps (sold separately in this listing) are sized to match each hose diameter and provide a secure, corrosion-resistant connection.