When you request a T-4000 quote, decide whether you want to evaluate a refill adapter supplied with the kit or the Green compressor package. Both offers start with the named twin-cylinder product. The differences are the extra hardware in the package and the evidence a qualified provider needs before assessing how you would obtain suitable breathing air.
Ask for two itemized quotes
The T-4000 refill adapter listing initially selects Black and the adapter package. The product description lists the adapter option in Black and Green. Its stated package adds a scuba refill adapter to the Standard kit. Put the larger supply cylinder on a separate line because you would need to arrange it separately.
The T-4000 air-compressor package listing initially selects Green and the compressor option. Its description lists the Standard kit and a compressor shown in the matching package photo. Ask for the exact compressor nameplate, power configuration and list of supplied fittings and filtration. A product picture helps identify which package you opened. Ask the seller to confirm the equipment in the written quote.
| Package | Ask the seller to itemize | Give the provider |
|---|---|---|
| With scuba refill adapter | The adapter model, supplied hardware and documentation. | The actual source valve specification and both equipment manuals. |
| Green kit with air compressor | The exact compressor version, power components, hose and filtration contents. | The compressor instructions, filtration and air-quality evidence for the proposed complete setup. |
Keep the air-supply decision with the qualified provider
Ask for the exact T-4000 and selected accessory manuals before relying on the arrangement. For the transfer option, the provider needs the real source equipment and breathing-air documentation. For a compressor, the provider needs the complete system, including the intended location and testing records. DAN’s breathing-gas guidance explains why the location, maintenance and output evidence matter.
Use the T-4000 compressor-package inquiry if you are requesting both offers. Name the two package selections, destination and available power or source-cylinder details. Ask the supplier to itemize each offer and provide the model documents for review before choosing between them.
Evergreen buyer guide verified November 12, 2026. Sources: TRIMIX T-4000 scuba refill adapter package listing (2026-10-19); TRIMIX T-4000 Green air-compressor package listing (2026-10-19); Divers Alert Network breathing-gas contamination guidance (undated).
Join the discussion
Share a question or a useful experience about this article. Every comment is reviewed before it appears.