Modular flowback filter system

A filter vessel, comprising:

• a filter housing defining an inner bore, the filter housing comprising:
• a flow inlet in the filter housing;
• a flow outlet in the filter housing, wherein the flow inlet and flow outlet are in fluid communication with the inner bore;
• and
• a removable portion providing access to the inner bore;
• and
• a removable filter insert positioned in the inner bore, the removable filter insert comprising a seal that engages with and seals against an inner surface of the inner bore of the filter housing between the flow inlet and the flow outlet.

A flowback filter system, comprising:

• a system inlet;
• a system outlet;
• a plurality of filter vessel;
• a plurality of inlet control valves providing selective fluid communication between the system inlet and one or more of the plurality of filter vessels;
• a plurality of outlet control valves providing selective fluid communication between the system outlet and one or more of the plurality of filter vessels;
• at least one access platform positioned proximate the pluralities of inlet and outlet control valves and proximate the plurality of filter vessels, wherein each of the pluralities of inlet and outlet control valves and each of the plurality of filter vessels are positioned for access from the at least one access platform at one or more ergonomically appropriate heights relative to an upper surface of the at least one access platform.