Quay Rent-A-John and Septic Service and Portable Toilet Rental in NM. Quay Rent-A-John and Septic Service serves Eastern New Mexico. We are located in Tucumcari, NM. Quay Rent-A-John has been in business for over 25 years. We provide excellent service and quality portable toilets and septic service. We have high quality equipment for all your rental and purchase needs. We specialize in portable restrooms for construction sites or special events. Handwashing stations, single tow trailer restrooms, or two tow trailer restrooms, septic pumping and holding tanks are also available. Call us today.