NEOBIOME

URL_022: Promax NZ — bunded diesel / oil-collection tank list prices (500 L, 1,000 L, 2,000 L)

Properties5
typesource
source_typeurl
authorPromax Plastics NZ
year2026
topicsenergy_generation, nz_specific

4 min read

URL_022: Promax NZ — bunded diesel / oil-collection tank list prices (500 L, 1,000 L, 2,000 L)

Source

https://promax.co.nz/products/500l-diesel-tank — original source (opens in a new tab; the file is not redistributed)

Promax NZ — bunded tank list prices (the RT_332 fuel-store anchors)

The verified price anchors behind the D34 fuel-store cost — RT_332 stays OPEN

Three Promax NZ product pages, captured 2026-07-14. Prices re-verified on the live pages at ingest and present in the saved HTML snapshots. The engine param diesel_tank_capex_per_l (4 NZD/L) remains assumed — these pages bracket it, they do not establish it. See the warning below.

Summary

Promax Plastics is a NZ tank manufacturer with published online pricing. Three product pages were captured as the evidence base for costing the D34 seven-day genset fuel store (fuel_store_l → diesel_tank_capex_per_l). They are the only NZ vendor prices found for bunded storage in the relevant size band — Sebco and Fuelchief, the two vendors that actually sell diesel-rated stations at 1–5 kL, publish no prices (quote-only).

Key claims

- claim: "Promax 'Bunded Diesel Tank 500 Ltr' — 500 L, NZD $3,805.00 tax included = $7.61/L. DIESEL-RATED: 'Diesel Grade UV stabilised LDPE'. '110% Bunding - Compliant' secondary containment."
  source_location: "https://promax.co.nz/products/500l-diesel-tank (accessed + captured 2026-07-14)"
- claim: "Promax '1,000L Bunded Oil Collection Tank' — 1,000 L, NZD $2,913.00 tax included = $2.91/L. 110% bunded. NOT diesel-rated: the page states it is for WASTE OIL COLLECTION ('ideal for farms, garages, work shops... where waste oil is likely to be collected')."
  source_location: "https://promax.co.nz/products/1000l-bunded-oil-collection-tank (accessed + captured 2026-07-14)"
- claim: "Promax '2,000L Bunded Oil Collection Tank' — 2,000 L, NZD $4,079.00 tax included = $2.04/L. 110% bunded. NOT diesel-rated: waste-oil collection, same product family as the 1,000 L."
  source_location: "https://promax.co.nz/products/2000l-bunded-oil-collection-tank (accessed + captured 2026-07-14)"

Neobiome Intelligence relevance

These are the only verified NZ retail anchors for the D34 fuel store. They bracket the engine’s diesel_tank_capex_per_l — but they do not validate it, and the page is filed to make that gap explicit rather than to close it.

ProductCapacityPrice (incl GST)$/LDiesel-rated?
Bunded Diesel Tank500 L$3,805$7.61Yes — “Diesel Grade UV stabilised LDPE”
Bunded Oil Collection Tank1,000 L$2,913$2.91No — waste-oil collection
Bunded Oil Collection Tank2,000 L$4,079$2.04No — waste-oil collection
Engine diesel_tank_capex_per_l——$4.00assumed

The 4 NZD/L is an interpolation across TWO gaps at once — it stays assumed

The only diesel-rated datapoint is **7.61/L** (500 L). The cheap datapoints (2.04–2.91/L) are **not diesel-rated** — they are waste-oil collection tanks used here as a *shell proxy*. So 4/L is a judgement that a 1–2 kL diesel-rated tank lands at roughly half the per-litre cost of the small diesel tank (scale economy) and roughly double the oil-spec shell of the same size (spec premium). Both moves are plausible; neither is evidenced. No NZ vendor publishes a diesel-rated price in the 1–2 kL band.

Supply-only. Excludes installation, base/slab, pipework, and any recurring compliance cost. RT_332 stays open for written Sebco / Fuelchief quotes — that is what would move this from assumed to sourced.

Research targets

Documents to retrieve

  • RT_337 — WorkSafe stationary-container-system compliance certificate (NZ). The RT_332 research pass reported that diesel ≥500 L connected to a stationary engine triggers a recurring stationary-container compliance certificate — which would apply to virtually any community genset fuel store and would be an OpEx line, not a one-off. ⚠ This claim is NOT verified: the WorkSafe pages behind it were never retrieved, and nothing on the Promax pages supports it. Retrieve WorkSafe “Stationary container system compliance certificates” + “Above ground fuel storage on farms” and verify (a) the volume threshold, (b) whether a community genset store is in scope, (c) the certifier fee and renewal period.

Research gaps

  • RT_332 (stays open) — a written quote for a diesel-rated self-bunded 1–2 kL tank (Sebco 2,300 L / Fuelchief double-wall). Until then diesel_tank_capex_per_l = 4 NZD/L is assumed, dq low.

Notes

Capture method. Found by web search on 2026-07-14; prices independently re-verified against the live pages, then snapshotted with curl. All three prices appear verbatim in the saved HTML. The raw is therefore an authoritative vendor capture, not an AI-prepared synthesis — hence data_quality: high for what the pages assert (three published list prices on 2026-07-14). It is emphatically not an endorsement of the $4/L derivation, which is a separate, unevidenced step.

Multi-file source — three HTML captures in url_022_promax-bunded-tank-prices/; no sha256: recorded (vendor HTML re-serves non-deterministically; a byte-hash would produce false drift alarms). Prices are the durable content and are quoted verbatim in key_claims above.

⚠ One upstream claim NOT reproduced: a secondary note stated Promax prices are “adjusted monthly”. No such statement appears on the pages. Treat the prices as a 2026-07-14 snapshot with no known refresh cadence.

Connections

Referenced by

Technologies (1): Diesel Genset (community-scale backup)

Sources (1): REG_016

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