Introduction

On most jobs, fitting a water tank takes too long and often leaks. This guide shows a new easy water tank fitting process that speeds things up and keeps joints dry. We’ll keep it simple: mark, drill, fit bulkhead connectors, set the float valve, add the overflow, then test. You’ll see clear sizes, torque tips, and checkpoints. Use this on domestic loft tanks, plant rooms, or small commercial jobs. With the new easy water tank fitting process, most installs land in 60–90 minutes with fewer call-backs.

Quick Answer

The new easy water tank fitting process is: mark centres, step-drill clean holes (typical 25–27 mm for 3/4", 32–35 mm for 1"), fit EPDM-gasket tank connectors hand-tight plus a quarter turn, connect valves and pipework, then fill and leak-check for 15–20 minutes. Finish with overflow, screen, and a 20 mm minimum air gap.

Table of Contents

• Why a New Easy Water Tank Fitting Process Works
• Tools and Materials Checklist
• Step-by-Step: New Easy Water Tank Fitting Process
• Pressure Testing, Commissioning, and Handover
• Common Mistakes and How to Avoid Them
• Pricing, Proposals, and Simple Handover Docs
• FAQ
• Conclusion

Key Takeaways

• A repeatable method saves 60–90 minutes per tank install.
• Clean holes and EPDM gaskets stop 80% of weeps.
• Aim for hand-tight plus 1/4–1/2 turn on bulkhead nuts.
• Keep water level 50 mm below overflow; air gap ≥20 mm.
• Soak-test for 15–20 minutes before sign-off.

Why a New Easy Water Tank Fitting Process Works

Old habits cause delays: rough drilling, wrong hole sizes, and over-torqued fittings. The new easy water tank fitting process fixes that with a tight sequence. You mark once, drill once, and assemble with gaskets that actually seal.

• Step drills cut clean holes in plastic tanks. No cracks. No burrs.
• Modern bulkhead (tank) connectors with EPDM washers seal without paste.
• Measured torque (hand-tight + 1/4–1/2 turn) avoids crushed walls.
• A set air gap and screened overflow meet common water regs.

Follow the new easy water tank fitting process and you’ll get consistent results across your team. Less rework. Fewer late-night call-outs.

Tools and Materials Checklist

Have everything ready. That’s half the job.

• Step drill bit set: 6–35 mm
• Pilot drill bit: 4–6 mm
• Hole saws (optional): 25–35 mm
• Deburring tool or sharp knife
• Tank connectors (3/4" and/or 1") with EPDM washers
• PTFE tape (8–12 wraps on threaded tails only)
• Part 2 float valve (preferably brass or WRAS-approved plastic)
• Isolation valve(s) 15 mm or 22 mm
• Overflow fitting with insect screen
• MDPE 25 mm or copper 15/22 mm as needed
• Marker, tape, level, torque/adjustable spanner
• Clean cloths and a spray bottle (soapy water for leak checks)

Step-by-Step: New Easy Water Tank Fitting Process

Use this numbered sequence on site. It keeps the job smooth and safe.

1. Isolate And Drain

   • Isolate supply. Open a low point to relieve pressure. Confirm zero flow.

2. Prepare The Base

   • Level and solid support are key. Aim for full bottom support. Shim if needed. Leave 150 mm top clearance for the lid and valve service.

3. Mark Centres

   • Mark inlet, outlet, and overflow centres. Keep adequate spacing: at least 50 mm between holes and 40 mm from edges/ribs.

4. Drill Pilot Holes

   • Use a 4–6 mm pilot. Drill square to the surface. Go slow.

5. Step-Drill To Size

   • Typical hole sizes: 25–27 mm for 3/4" connectors; 32–35 mm for 1". Check the fitting spec. Deburr both sides.

6. Fit Tank Connectors

   • Place the EPDM washer inside the tank on the wet side. Insert the connector. Fit the outer nut. Tighten hand-tight, then add 1/4–1/2 turn with a spanner. Do not over-crush.

7. Connect The Inlet Valve

   • Install the Part 2 float valve on the inlet connector. Keep PTFE to threaded joints only (8–12 wraps). No paste on EPDM faces. Add an isolation valve on the supply line.

8. Set Water Level And Air Gap

   • Adjust the float so the water line sits the overflow and maintains an or twice the inlet diameter (whichever is larger), per common water safety guidance.

• Fit outlet to service line. Use isolation valves for maintenance. If you install a drain, keep it valved and capped.

11. Fill And Soak-Test

• Crack open the supply. Fill slowly. Wipe each joint dry. Watch for weeps for 15–20 minutes. Use a tissue test or a soapy water spray on threads.

12. Insulate And Lid

• Fit the lid. Add 25 mm insulation wrap where needed. Label valves. Take photos for the handover pack.

Repeat this new easy water tank fitting process on each job. It standardises your crew and cuts errors.

Pressure Testing, Commissioning, and Handover

• Vented Tanks: A static fill and soak test is normally enough. Hold the level for 20 minutes. Check the base for damp rings.
• Sealed Lines: If you have downstream sealed pipework, you can air test to 0.5 bar or water test to 1.0 bar for 10 minutes. Follow the component ratings.
• Float Valve Check: Open a downstream tap, let the ball valve refill, then shut. Confirm cut-off with no drips.
• Overflow Prove: Gently lift the float to simulate high level. Confirm water exits the overflow visibly.
• Hygiene: Keep lids on, use screened vents/overflows, and avoid dead legs. Follow local water regulations.
• Handover: Note valve positions, set level, and photos. Many contractors find a simple one-page handover cuts call-backs.

The new easy water tank fitting process ends with a clear sign-off: level set, joints dry, overflow proven, and pics logged.

Common Mistakes and How to Avoid Them

• Wrong Hole Size

  • Always read the fitting spec. Typical is 25–27 mm (3/4") and 32–35 mm (1"). Test-fit before final tightening.

• Over-Tightening

  • More torque isn’t better. Aim for hand-tight + 1/4–1/2 turn. Over-crush can bow the wall and create slow leaks.

• Skipping Deburr

  • Burrs cut gaskets. Always deburr inside and out. A 30-second deburr saves a return visit.

• No Air Gap

  • Keep ≥20 mm or 2× inlet diameter. It’s a simple adjustment on the float arm.

• Poor Overflow Run

  • Use a screen and a steady fall of 10 mm per metre. Terminate to a visible point.

• Dry-Fitting Without Test

  • Fill, wait 15–20 minutes, and tissue-test. Most weeps show up in the first 5 minutes.

Use the new easy water tank fitting process to avoid these errors every time.

Pricing, Proposals, and Simple Handover Docs

Clean installs are great. Clean paperwork wins trust. On site, record sizes, photos, and notes while you work. Then turn them into a clear proposal and invoice fast.

• Capture scope, fittings, and photos.
• List the tank size (e.g., 250 L, 500 L, 1000 L), valve types, overflow size.
• Add timing: 60–90 minutes for standard install, plus access or lift time.

Many contractors use tools like Donizo to speak notes on site (voice to proposal), send a branded PDF, get e-signature, and convert to an invoice in one click. If you’re also looking to streamline professional proposals, our guide covers clear line items, standard terms, and realistic lead times. This pairs well with understanding project timelines and using invoice templates that save time.

FAQ

What hole size do I need for a 3/4" and a 1" tank connector?

Typical sizes are 25–27 mm for 3/4" and 32–35 mm for 1". Always check the manufacturer’s data for your exact fitting. Step-drill and test-fit before final tightening.

Should I use PTFE tape or paste on tank connector gaskets?

Use no paste on EPDM gaskets. PTFE is only for threaded tails (typically 8–12 wraps). The gasket seals the tank wall; paste can cause slips or over-compression.

How long does the new easy water tank fitting process take?

Most domestic installs take 60–90 minutes, not counting access or drain-down. Complex commercial setups may take longer due to controls, manifolds, or limited space.

How high should I set the water level and air gap?

Set the level 50 mm below the overflow. Keep an air gap ≥20 mm or 2× the inlet diameter, whichever is greater. This helps prevent backflow and meets common guidance.

What’s the best way to check for slow leaks?

After filling, wait 15–20 minutes. Wipe joints dry, then run a tissue test. A light tissue shows even tiny weeps. A soapy water spray also helps on threaded joints.

Conclusion

A repeatable method beats guesswork. The new easy water tank fitting process—clean drilling, EPDM gaskets, measured torque, proven overflow, and a short soak test—delivers tight, tidy installs with fewer call-backs. Next steps: 1) Standardise your hole sizes and torque rule; 2) Train your team on the 12-step sequence; 3) Use photos for every handover. For quick quotes and fast sign-off, platforms such as Donizo help you capture details on site, send a branded proposal, get e-signature, and invoice in one click. Put this process to work on your next tank job.