Operations & Maintenance
Handover Document
Electric Premium — United Kingdom
Product warranty
Every Tubmarine product is designed and fabricated in Britain using high grade materials and precision craftsmanship. This warranty covers defects in materials or workmanship under normal residential use and applies to products supplied within the United Kingdom.
| Component | Warranty period |
|---|---|
| 316 Stainless Steel Tub Structure | 10 Years |
| Kebony Timber Cladding | 10 Years |
| Electric Heating System | 2 Years |
| Pumps, Plumbing & Electrical Components | 2 Years |
| Lid and Steps | 2 Years |
Important: All electrical elements must be installed by a qualified electrician in accordance with current UK regulations. Proof of purchase is required for any claim. Tubmarine reserves the right to inspect the product prior to authorising repair or replacement.
Warranty exclusions
This warranty is limited to manufacturing defects and does not cover:
- Normal ageing or wear over time
- Incorrect installation or failure to follow supplied instructions
- Inappropriate water chemistry or failure to maintain balanced sanitiser levels
- Use of unsuitable or corrosive chemicals
- Unauthorised modifications or third party repairs
- Damage resulting from freezing, flooding, fire, lightning or extreme weather conditions
- Commercial or high frequency use unless agreed in writing
Product specification
The Tubmarine Electric Premium is available in two configurations. Key technical data for both models is set out below for reference.
4-person model
2-person model
Materials & construction
Water chemical treatment plan
The following treatment plan applies to this tub (approximately 700–1,100 litres). Sanitiser: bromine granules & tablets. Shock treatment: non-chlorine shock. Test kit: LaMotte Insta-Test 3.
| Frequency | Task |
|---|---|
| Every 3–4 days & after each use | Test bromine and pH using LaMotte Insta-Test 3. Add bromine granules as needed (2–3 g per 100 L) with pumps running. Remove debris and check circulation. |
| Every 2–3 days | Check the floating dispenser and ensure it contains one bromine tablet. Tablets slowly release bromine to maintain a steady sanitiser level; granules dissolve instantly. Tablets typically dissolve in 4–5 days depending on temperature and circulation. |
| Every 1–2 weeks | Clean the filter cartridge (rinse or use cartridge cleaner). The cleaner the filter, the better the water quality. |
| Weekly | Test and adjust pH levels using pH+ or pH– to maintain 7.2–7.6. Add non-chlorine shock (~10 g per 1,000 L) with pumps running to oxidise contaminants. Wipe waterline and underside of cover to prevent build-up. |
| Every 3 months | Drain, clean, and refill with fresh water. Heavy bather load, high temperatures, or cloudy/odorous water may require earlier changes. On refill: set pH 7.2–7.6, add bromine granules to 3–5 ppm, then resume normal routine. |
Note on chemical brands: All brands vary — always read the manufacturer's recommended dosage rates. The LaMotte Insta-Test 3 gives an instant reading as soon as the strip is removed from the water.
Chemical safety
Optional: smart water monitoring
Purezone® by Balboa
Automates spa water testing and delivers expert dosing advice direct to your phone — so you spend less time testing and more time enjoying the tub.
Automated testing
Schedules daily or every-other-day water tests automatically — no manual test kits required.
App-based results
Results and expert water care advice appear in the Purezone app within minutes of each test.
What it measures
Each test reads pH, free chlorine or total bromine, and total alkalinity — the three key parameters for this tub.
Where to purchase: The Purezone unit, replacement P3 cassettes, and accessories are available directly from Balboa at purezonebybalboa.com. A downloadable user guide is also available on the site.
Material care guide
Your Tubmarine combines two premium materials — 316 marine-grade stainless steel and Kebony modified timber. Each requires a simple but distinct approach to keep it looking its best.
316 Stainless steel
- Use a soft microfibre cloth — always wipe in the direction of the grain to preserve the brushed finish
- For daily cleaning use Cif Perfect Finish Stainless Steel Cleaner
- For water spots or limescale use Cif Limescale Remover Spray — rinse thoroughly and dry with a microfibre cloth afterwards
- Never use abrasive pads, scourers or steel wool
Kebony timber cladding
- No sealing or oiling required — Kebony weathers naturally to a silver-grey patina over time
- To preserve the original brown colour, apply a clear UV-protective finish annually
- Clean once or twice a year with warm water and mild detergent
- For stubborn marks use a soft brush — never a pressure washer
- Lightly sand if needed to remove marks or restore smoothness
- Avoid leaving damp items or planters directly on the wood for extended periods
Tub interior
- Only clean the interior when the tub is fully drained
- A soft-bristled broom is ideal for sweeping the tub floor without stepping inside
- Avoid abrasive sponges or harsh chemical cleaners
General tips
- Replace the filter cartridge every 3–6 months as part of routine maintenance
- Keep the insulated cover closed when not in use to retain heat and reduce chemical consumption
- In freezing conditions, drain the tub fully and protect components to prevent frost damage
- Regular care protects your warranty and ensures long-term performance
Getting started
The Tubmarine Electric Premium is designed for straightforward, intuitive operation. A 32-amp electrical supply is required and must be connected by a qualified electrician before first use.
| Step | Action |
|---|---|
| 1 | Ensure the unit has been installed and connected by a qualified electrician in accordance with current UK wiring regulations. |
| 2 | Fill the tub to the recommended level using a clean water supply (1,100 L for the 4-person model; 700 L for the 2-person model). |
| 3 | Switch on circulation using the touch screen control panel and allow the system to run before adding any chemicals. |
| 4 | Follow the Day 1 water chemistry setup: set alkalinity, adjust pH to 7.2–7.6, then add bromine granules to achieve 3–5 ppm. Refer to Section 03 for the full treatment plan. |
| 5 | Set your desired temperature on the touch screen. The 3 kW electric heater will bring the water to temperature automatically. |
| 6 | Wait 20–30 minutes after the final chemical addition before entering the tub. |
Further technical documentation including wiring diagrams, component data and full specification sheets is available on request from Tubmarine. Contact via tubmarine.co.uk/contact or visit the website for support.
Tubmarine Ltd
Designed & fabricated in Britain