How to identify a Lowara SV/e-SV plug: drain, fill or connection port

Why a close-up photo can mislead

A tight photo of the plug may hide the most important clue: its position on the pump.

For e-SV pumps, the installation manual instructs installers to remove the plugs covering the ports before aligning the pump and pipe flanges and fastening the pipework . So a plug seen near a side opening, flange or connection point may be a temporary or service port cover rather than a drain or fill plug.

The e-SV technical documentation also refers to fill/drain plugs and, depending on the component or version, fill/drain/air plugs . It also notes that a second plug is available for the 10SV, 15SV and 22SV series . In short, the outside appearance is not enough; the plug’s location on the pump body matters.

A reliable way to identify the plug

Start with the nameplate. Confirm the exact model and series before ordering parts or removing anything.

If the pump is an SV8, compare the plug position with the SV8 parts documentation. In that documentation, 140170160 is the drain plug with O-ring, and 140170150 is the fill plug with O-ring .

If the pump is an e-SV or another SV variant, use a wider photo or inspection view that shows the pump body, flanges, ports and the plug position. That wider context helps distinguish a service plug from a plug covering a connection port, which is specifically described in the e-SV manual . For non-SV8 models, compare the part with the documentation for that exact series because plug arrangements can vary by version .

Safety before loosening any plug

Do not loosen or remove a plug until the pump is made safe. Lowara e-SV safety guidance says to check that the power supply is disconnected and that the unit, control panel and auxiliary control circuit cannot restart, even accidentally, before work begins .

That check should come before inspection, draining, venting or part removal.

Practical takeaway

For a confirmed Lowara SV8, check these two documented references first: 140170160 for the drain plug with O-ring and 140170150 for the fill plug with O-ring .

For any other SV/e-SV pump, or when the photo does not clearly show the nameplate and plug location, keep the identification conditional. Confirm the exact model, then match the plug’s position and function against the correct parts documentation.