Most electric seats need very little pressure: TOTO and Alpha list a minimum of 7.25 psi while flowing, and normal homes are far above that. So a weak spray usually has a simpler cause.
Check these first
- The pressure setting. Many seats reset to a low default, or remember a different user's preset.
- The valve. Make sure the T-valve or shutoff is fully open.
- The inlet filter. Most seats have a small strainer where the hose enters the seat. Shut off the water, unscrew it and rinse out the sediment. Bio Bidet's manuals name a clogged strainer as a cause of weak pressure.
- A kinked hose behind the toilet.
- Power-saving or child modes that limit pressure.
If it's still weak
Some seats simply spray less water. Most electric seats spray about 0.3–0.4 L/min; high-volume seats such as the BidetKing Crown and Alpha's Wave series reach about 1 L/min, and the Bio Bidet BB-2000 uses a pump. See bidet seats with the strongest spray.
Non-electric attachments do depend on house pressure. If yours is low throughout the house, the fix is with the supply, not the bidet.
