Hi Dieselsfriend, thank you for contacting Delta Faucet Company!
We apologize our product does not meet your expectations! Our U4005-RB-PK is attached directly to the wall with screws. This model does not have the option to suction to the wall.
We do manufacture 3006C161PK which is a suction cup mount. Please ensure the surface is clean, dry, and porous-free to attach properly.
We appreciate your feedback. Please reach out directly if you have further questions!
Best Regards,
Kyra
Digital Communications Specialist