Hello HomeDepot customer,
Thanks for writing a review and we’re sorry to learn your disappointment. It is true that the WD4070 model does not include foam filter. if you are picking up clean water, the pleated paper filter can be removed. When picking up small amounts of liquid the paper filter may be left in place. Please note that when the filter becomes saturated, misting may occur at the blower port. The VF3700 filter adds protection for your vacuum during wet pick-up by keeping water-borne debris out of the motor. If you have any further questions or concerns, feel free to call us at 1-800-4-RIDGID (1-800- 474-3443) or you may send your email to info@ridgidvacs.com or info.info@emerson.com.
Regards,
RIDGID® Customer Support