Domus GTA-140 Post Top Adaptor

The Domus GTA-140 is a post top adaptor — the collar that lets a Domus post-top lantern sit on a 43 mm column. Five powder-coated colours.

⭐ What this part is for, and why it matters

• ⭐ A post-top lantern has to fit the column it sits on, and post-top spigots are not standardised — a lantern made for one column diameter will not go onto another.
• ⭐ This adaptor is what bridges that gap. ⭐ Three sizes are made: 43 mm (this one), 50 mm and 60 mm.
• ⚠ Nothing in the Domus catalogue connects the adaptors to the post tops they serve. The post-top listings record no spigot size, and these adaptor listings name no lantern. ⭐ So the one part that makes a retrofit possible is effectively invisible from either side.
• ⭐ Tell us the outside diameter of your column and which lantern you want, and we will put the two together — this is exactly the sort of question worth asking before you order rather than after a ten-day lead time.

⚠ It records two numbers, and labels neither

• ⛔ Nothing on the listing says which is which, and the two are nearly four times apart.
• ⛔ And we now think the 165 mm may not belong to this product at all. A second listing — titled “GTA-131 Chester Series Diffuser Only” — carries this adaptor's web address and the same 165 mm diameter. ⭐ 165 mm is a plausible size for a Chester diffuser ring and an implausible one for a column spigot, so the figure may have travelled from that record to this one.
• ⚠ We are not going to assert either reading. ⭐ What is certain is the 43 mm column size in the title, which matches the GTA-141 at 50 mm and the GTA-142 at 60 mm — a coherent set of three. Order on that.
• ⭐ Ask us and we will confirm both figures with Domus before you order.

⛔ The obvious web address serves a different product

• ⛔ A second listing carries the plain domus-gta-140-43mm-post-top-adaptor address, and it is a Chester diffuser — this adaptor sits at the same address with a “-1” on the end.
• ⚠ So a search result or an old link can land you on the wrong product, and the two are not remotely interchangeable.
• ✅ You are on the right page: this listing is the adaptor. ⭐ If you arrived somewhere titled a Chester diffuser while looking for an adaptor, that is why.
• ⭐ We measured the whole catalogue: exactly 2 listings of 843 have a title product code that disagrees with their web address, and that Chester listing is one of them.

⭐ Which adaptor you need

• ⚠ Measure the OUTSIDE diameter of your column, not the inside, and not the nominal pipe size — ⭐ a “40 mm” pipe is rarely 40 mm on the outside.
• ⚠ If your column is not 43, 50 or 60 mm, none of these will fit, and no other adaptor is offered. ⭐ Tell us the measurement before ordering.

⭐ Order it in the same colour as the lantern

• Five powder-coated finishes — Beige, Black, Burgundy, Green, White — the same palette as the lanterns.
• ⭐ Which exists precisely because the adaptor is visible. ⚠ Order it with the lantern and in the same colour; a separate order is a separate powder-coat batch, and on a 165 mm collar directly beneath the lantern a mismatch would show.

Where it works

• Fitting a Domus post-top lantern to a 43 mm column.
• Retrofitting an existing or heritage post where the lantern has failed.
• A specified column, where an architect wants their own proportions.
• ⚠ Not without measuring the column's outside diameter first.

Specifying it

Post top adaptor for a 43 mm column. Recorded diameter 165 mm. Beige, Black, Burgundy, Green or White. ⚠ Warranty 1 year. ⚠ Two figures are recorded and neither is labelled. The title's 43 mm is the column size and fits a coherent set with the 50 mm and 60 mm adaptors. ⛔ The 165 mm is doubtful — a Chester diffuser listing carries this product's web address AND the same figure, so it may belong to that record. ⛔ That listing also occupies the plain adaptor URL; this one carries a "-1" suffix. ⭐ Three sizes exist: 43 mm, 50 mm and 60 mm. ⛔ No listing connects these adaptors to the post-top lanterns they serve — tell us your column diameter and the lantern you want and we will match them.

Supplied and supported by Lights For You.