• Sand tank o-ring missing.
• Sand tank o-ring dirty.
• Flange clamp not firm.
• 6-way valve damage.
• Remove the 6-way valve cover and ensure that the o-ring is in place.
• Clean o-ring sand tank with water from garden hose.
• Secure the clamp with the supplied wrench.
• Contact the Intex service center via www.intexsupport.be.