Choosing diaphragms for a Wilden T15 Turbo-Flo pump? Compare material types, spot early wear, and learn what to confirm before you order.
If liquid is coming out of the muffler, that almost always means a diaphragm has split. Air bubbles in the discharge point the same way, and so does flow that has been fading for a few weeks with nothing else changed.
Before you fit the next one, work out why the last one went. Wrong material, high discharge pressure, air set higher than it needs to be and abrasive solids in the fluid are the usual reasons. Swapping like for like just repeats the failure.
On the T15, diaphragms are generally offered in PTFE and a range of elastomers such as nitrile, EPDM and FKM. PTFE copes with aggressive chemicals but has a shorter flex life. The elastomers flex better, though each has chemicals it can’t stand. Use a compatibility chart and your actual fluid, not the closest guess, and check the material code on your parts list.
Change them as a pair, and take a look at the shaft and seals while the pump is open. The diaphragms we supply are original Wilden, made for genuine Wilden T15 pumps. Send the pump model, material code and what you’re pumping to sales@haquanpump.com and we’ll help you pick.
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