Replacement Bladder | 100L | Italian-Made
SKU: EA-PT-PT-100L-02
Ships free Australia-wide. Delivered by Allied Express or Aramex bulky freight, 3–10 business days depending on state.
Free Click & Collect from our Wyong NSW showroom (in stock for immediate pickup).
Same-day dispatch on orders before 12pm AEST.
In stock.In stock · ships from Wyong, NSW
Order today for fast dispatch
14-day returns on damaged or faulty items — returns policy
Questions? Call (02) 8772 8162 Mon–Thu 9am–3pm
- For tank size
- 100 L
- Material
- EPDM / BUTYL
- Origin
- Made in Italy
- Drinking water
- Compatible
Specifications
- Type
- Replacement bladder (membrane) for pressure tank
- Compatible with
- 100L Bestank-Solar pressure tank (BHT-100V-S)
- Material
- EPDM / BUTYL rubber composite
- Manufacture
- Italy
- Drinking water compatible
- Yes
- Hygienic certifications
- European Union + USA institutions
An Italian-made replacement bladder for the Bestank-Solar 100L pressure tank — the most common service item across the life of a pressure tank, and the part you change when the tank itself is still structurally sound but isn't holding pressure correctly.
When You Need to Replace the Bladder
A pressure tank's steel shell typically outlasts the membrane by 2-3×. Symptoms of bladder failure:
- Pump cycles much more frequently than it used to — bladder has lost pre-charge or has a tear
- Water appears at the air-charge valve when you press the Schrader pin — bladder has ruptured
- Reduced effective tank capacity — bladder has weakened and isn't maintaining its working volume
- Pressure tank delivery feels weaker even though the pump runs normally
The fix is bladder replacement, not tank replacement. The Italian-made bladder is the same factory-original membrane that ships in new Bestank-Solar 100L tanks — buying the bladder alone vs a complete new tank typically saves 60-70% of the cost.
Why Italian Membranes Specifically
The European pressure tank industry has been refining membrane rubber chemistry for 50+ years. The result is the Italian EPDM/BUTYL composite that's become the global standard for drinking-water-grade membranes:
- EPDM (ethylene-propylene-diene monomer) for elasticity, fatigue resistance, and pressure-cycling longevity
- BUTYL for impermeability — air doesn't leak through and water doesn't migrate across
- Drinking-water hygienic certifications approved by European Union and USA institutions
Non-Italian bladders typically use lower-grade EPDM blends and may not carry drinking-water certifications. For permeate water storage on an RO system, the certification matters — the bladder is in direct contact with the water you'll drink.
Specifications
- For: 100L pressure water tank (Bestank-Solar BHT-100V-S)
- Material: EPDM / BUTYL rubber
- Manufacture: Made in Italy
- Drinking water compatible: Yes
- Certifications: EU + USA hygienic certifications
What's Included
- 1 × replacement bladder (membrane) for 100L pressure tank
Does not include tank shell, fittings, or pre-charge valve — these reuse from your existing 100L tank.
Key features
- Italian-made replacement bladder for 100L Bestank-Solar pressure tanks
- EPDM/BUTYL rubber — global standard composite
- Drinking-water compatible — direct water contact safe
- Hygienic certifications from EU and USA institutions
- Saves 60-70% vs full tank replacement
- Original-equipment specification — same membrane as new tanks
Recommended for
- Bestank-Solar 100L pressure tank with bladder failure symptoms
- Tanks cycling frequently due to lost pre-charge
- Ruptured bladder repair (water at the air-charge valve)
- Preventive maintenance after 7+ years of operation
Compliance & certification
Replacement bladder for pressure tank — downstream-of-meter component, not subject to WaterMark. Drinking-water hygienic certifications confirmed from European Union and USA institutions per manufacturer.
Ready to order?
Order before 12:00pm AEST on a business day for same-day dispatch from Wyong NSW. See shipping details.
Frequently bought together
More pressure tanks
What customers say
5.0 from 74 customer reviews
- Facebook
“Highly recommended. Unique parts with reasonable prices and great after sales service.”
- Google
“I recently had a whole house water filter system installed and was extremely pleased with the entire experience. Adam demonstrated exceptional knowledge and took the time to explain every aspect of the system clearly.”
Australian-owned
Real Wyong NSW warehouse and showroom. ABN 24 638 197 734. Proper tax invoices on every order.
Same-day dispatch
Orders placed before 12pm AEST on a business day ship the same day from Wyong. Tracked Australia-wide.
No proprietary lock-in
Standard 10" and 20" Australian housings. Buy replacement cartridges from any supplier.
Replacement Bladder | 100L | Italian-Made
$155.00 AUD