Short answer: Repair may be sensible for an identifiable, supported fault in a correctly specified unit. Replacement becomes more likely when the casing is damaged, parts are unavailable, failures recur, the model is underspecified or the installation itself needs correction.
Situation and next step
| Situation | Sensible next step |
|---|---|
| Single repairable fault, supported model | Compare the diagnosed repair with the unit’s wider condition. |
| Repeated failures or obsolete parts | Review a correctly specified replacement and any pipework correction. |
| Casing or installation is unsafe | Stop use and prioritise making the system safe. |
Start with diagnosis, not age
Age matters, but it is not enough by itself. A supported older unit with a clear minor fault may be repairable; a newer but unsuitable installation may keep failing until the underlying design is corrected.
Compare the complete scope
A replacement quote should cover compatibility with all fixtures, pipe changes, electrical work, access and disposal. A repair quote should state the diagnosed fault and parts proposed.
Keep evidence
Photograph the model label and installation, retain previous invoices and note recurring symptoms. This helps avoid repeating an unsuccessful repair.
Sources and scope
This guide is general information, not a diagnosis or project approval. Product-specific instructions take priority.
- GOV.UK: Drainage and waste disposal — Approved Document H (guidance for England)
- SFA Saniflo UK product brochure (manufacturer product-selection context)