Every BLACKBOX system built with care

Working to keep prices down

Minor Dwelling Wastewater, Sorted.

BLACKBOX pump systems — 100% New Zealand built for tiny homes, cabins & RVs.

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100% NZ Made

Designed & built in New Zealand

1,000+ Installed

Trusted across New Zealand

20-Year Tank Warranty

Built to last

Easy DIY Install

DIY kits available

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From our blog

U400-35 Flexiseal Review for 40mm Plumbing

Our U400-35 Flexiseal review covers fit, installation and real-world use in 40mm waste lines for tiny homes, cabins, RVs and DIY plumbing jobs across NZ.

Float Switch Review for Waste Tanks and Pump Systems

This float switch review explains what matters in wastewater tanks, from switch type and mounting to reliable alarms, pump control and servicing in NZ.

PVC Pipe Adaptors: Choosing the Right Fit

Choose PVC pipe adaptors with confidence for 40mm plumbing in tiny homes, cabins and RVs. Learn sizes, joins and installation checks for lasting service.

Can PVC Fittings Leak? Causes and Proper Fixes

Can PVC fittings leak? Learn why joints fail, how to find the source, and the practical steps that keep 40mm waste pipe connections dry and reliable daily.

PVC Solvent Weld Versus Compression for 40mm Pipe

PVC solvent weld versus compression fittings for 40mm pipe: compare strength, access, vibration and future servicing for tiny homes, cabins and RVs alike.

How to Install a PVC Trap and Avoid Leaks

Learn how to install PVC trap fittings on a tiny home, cabin or RV sink, with the right fall, water seal and leak checks before you use the drain safely.

Greywater Filter Versus Soak Pit: Which Is Best?

Greywater filter versus soak pit: compare treatment, drainage, maintenance and site suitability for tiny homes, cabins, baches and off-grid builds in NZ

Wastewater Pump Controls That Prevent Call-Outs

Practical wastewater pump controls for tiny homes and cabins: level sensing, alarms and settings that protect your system and prevent messy call-outs.

Tank Fitting Installation That Stays Leak-Free

Get tank fitting installation right with practical advice on hole sizing, seals, pipe support and testing for tiny homes, cabins, RVs and off-grid jobs.

How to Size a Wastewater Pump for Small Homes

Learn how to size a wastewater pump for a tiny home, cabin or RV, with practical checks for flow, head, pipe size and reliable wastewater handling at site.

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Working to keep prices down

Minor Dwelling Wastewater, Sorted.

100% NZ Made

1,000+ Installed

20-Year Tank Warranty

Easy DIY Install

Shop by category

BLACKBOX SYSTEMS

BLACKBOX-62 Portable Waste Management System For Tiny Homes

BLACKBOX-85 Portable Waste Management System For Tiny Homes

BLACKBOX-270 Standard Waste Management System For Tiny Homes

BLACKBOX-270Max Portable Waste Management System For Tiny Homes

BLACKBOX-270SuperMax Macerator Waste Management System For Tiny Homes

HYDROLOK U400-35 EPDM Bulkhead Seal – Flexible Tank Fitting for 110 mm Pipe (1 Pack)

HYDROLOK U400-35 EPDM Bulkhead Seal – Flexible Tank Fitting for 110 mm Pipe (2 Pack)

HYDROLOK U400-35 EPDM Bulkhead Seal – Flexible Tank Fitting for 110 mm Pipe (3 Pack)

From our blog

U400-35 Flexiseal Review for 40mm Plumbing

U400-35 Flexiseal Review for 40mm Plumbing

HYDROLOK U400-35 EPDM Bulkhead Seal – Flexible Tank Fitting for 110 mm Pipe (1 Pack)

HYDROLOK U400-35 EPDM Bulkhead Seal – Flexible Tank Fitting for 110 mm Pipe (2 Pack)

HYDROLOK U400-35 EPDM Bulkhead Seal – Flexible Tank Fitting for 110 mm Pipe (3 Pack)