ASAB DDP42 Replacement Parts #45 - Suction Pipe Fitting

Part Code: ASAB-SDDP42-45

Introducing the ASAB DDP42 Suction Pipe Fitting — a purpose-fit connection fitting used on ASAB DDP42 double diaphragm pump suction plumbing to provide a secure, serviceable join between the pump inlet hardware and your suction pipe/hose setup. Built for dependable sealing (where even tiny leaks ruin your day), this fitting helps maintain strong prime and consistent feed by keeping the suction side airtight and correctly aligned.

On AODD pumps, suction-side fittings cop the worst of it: movement, vibration, over-tightening, and the occasional “it’ll be right” thread mismatch. When this fitting is worn, cracked, or thread-damaged you’ll often see slow priming, bubbles in the line, surging/pulsing, reduced flow, or product creeping back — even if there’s no obvious external leak. Replacing it with the correct DDP42 part restores the seal at the inlet and protects the pump port threads from getting flogged out.

Whether you’re rebuilding the suction side, repairing damaged plumbing after job-site knocks, or chasing stubborn prime issues, the ASAB-SDDP42-45 is a workshop-ready solution to keep your DDP42 feeding cleanly and consistently.

Key Benefits

• Direct replacement suction pipe fitting for ASAB DDP42 configurations

• Restores a secure, leak-resistant suction-side connection

• Helps prevent prime issues caused by air leaks: bubbles, surging, cavitation, slow prime

• Ideal replacement for fittings that are cracked, cross-threaded, or thread-damaged

• Supports tidy, serviceable suction plumbing layouts

• Helps protect pump inlet ports by ensuring correct thread engagement

• Built for commercial workshop and job-site use

What’s Included

• DDP42 Suction Pipe Fitting — ASAB-SDDP42-45

Safety Check

• Isolate and depressurise first: Shut off air supply, bleed the airline fully, and ensure the pump and lines are not pressurised before removing suction fittings.

• Chemical exposure: Wear gloves and eye protection — residual product can spill when cracking suction joints.

• Confirm thread type before install: Match BSP vs NPT and size — don’t force mismatched threads (it’ll leak and it’ll strip).

• Seal it properly: Use the correct sealing method (tape/sealant where appropriate) and keep sealant out of the flow path.

• Don’t over-tighten: Suction fittings crack or distort easily — tighten to seal, not to win an arm-wrestle.

• Prime test gradually: Start at low air pressure, confirm steady flow with no bubbles, then ramp up to operating conditions.

ASAB – Engineered for Performance, Built to Last.