As filed with the Securities and Exchange Commission on August 2, 2018

Registration No. 333-222242

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

POST-EFFECTIVE

AMENDMENT NO. 1

TO

FORM S-8

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

(Telephone number, including area code, of agent for service)

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. o

Explanatory Note

This Post-Effective Amendment No. 1 (this “Amendment”) to the Registration Statement on Form S-8 of EnviroStar, Inc. (the “Company”) filed with the Securities and Exchange Commission on December 22, 2017 (the “Original Filing”) is being filed by the Company in accordance with Rule 462(d) under the Securities Act of 1933, as amended, to add Exhibit 23.3, the consent of Aprio, LLP (formerly known as Habif, Arogeti and Wynne, LLP), which was inadvertently omitted from the Original Filing. Except for the addition of such exhibit, this Amendment does not update, amend or modify any other information, statement or disclosure contained in the Original Filing.

Part II

INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 8. Exhibits.

The following exhibits are filed herewith (or were previously filed with the Original Filing, as indicated below):

* Previously filed.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed by the following persons in the capacities and on August 2, 2018.