Scenario: 15mm rising main into loft. Just before feeding the CWT a 22mm tees off to feed the bathroom. Obviously the pressure in the 22mm will be lower than the 15mm but flow rate should be the same.
If at the bath tap end of the 22mm I tee off a 15mm pipe to feed an electric shower, will the pressure in this 15mm be the same as the original rising main (assuming bath tap not running at the same time)?
If at the bath tap end of the 22mm I tee off a 15mm pipe to feed an electric shower, will the pressure in this 15mm be the same as the original rising main (assuming bath tap not running at the same time)?