About Hydrojet Pump Coupling ‑ A/D Pipe Lay‑Z‑Spa® A/D Coupling is a replacement for a missing or broken A/D coupling. Without a A/D coupling, your Lay‑Z‑Spa® will stop circulating water efficiently. This is because the Lay‑Z‑Spa® coupling is used to connect the A or D pipe on a filter pump to the inlet and outlet on a Lay‑Z‑Spa®. If your existing A or D coupling is badly damaged, you're likely to notice water drizzling out of the pipes and draining your Lay‑Z‑Spa®. If left too long, this can slow the flow of water and start to affect its cleanliness. This makes the B/C coupling one of the most important Lay‑Z‑Spa® parts to have in full working order. Compatible with: Hawaii HJ Pro 2021 + Majorca HJ Pro Maldives HJ Pro 2021 + Palma HJ Pro Santorini HJ Pro
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